Grief Prevention

Grief Prevention

AUTOMATICALLY PREVENTS ALL FORMS OF GRIEF, including build/break, theft, spam, fire, spawn camping, lava and more, so you don't have to undo any damage after the fact. No configuration or database required! Stop responding to grief and prevent it instead. Grief Prevention will solve your grief problems without requiring you to manage a roster of trained administrators, juggle 10 different anti-grief plugins, take away cool standard game features, publish a training manual / tutorial for players, or add explanatory signs to your world. You can also choose to integrate PvP elements into build design to finally get a PvP experience befitting a sandbox game about creativity.

Grief Prevention stops grief before it starts automatically without any effort from administrators, and with very little (self service) effort from players. Solve all your grief problems with a single download, no database, and no configuration step.

Official Servers (Try it for yourself!)

You can experience this plugin for yourself (as a player) by joining any of these public servers. :) We maintain these servers personally, which helps us catch bugs and spot opportunities for new features and improvements. Have fun!

Feature List

Yes, everything is customizable. See Setup and Configuration.

  • No database or world backups required.
  • Extremely efficient CPU / RAM usage.
  • Land claims are easy to manage.
    • New players get automatic claims around their first chests.
    • Players who ask for help in chat get an instant link to a demonstration video.
    • Resizing claims and creating new claims is done with ONLY the mouse, no slash commands.
    • When a player appears to be building something nice outside his claim, he's warned and shown his claim boundaries.
    • Claim boundaries are easy to see, and don't require any client-side mod installation.
    • Extremely easy-to-remember, single-parameter slash commands for giving other players permissions.
    • Claim subdivision and granular permissions are available to organize towns and cities. Watch this video.
  • It's IMPOSSIBLE to grief a land claim. Watch this video.
    • No building or breaking.
    • No stealing from ANY containers.
    • No sleeping in beds.
    • No button/lever usage.
    • No adjusting redstone repeaters.
    • No pushing blocks in with pistons.
    • No pulling blocks out with pistons.
    • No TNT damage.
    • No creeper damage.
    • No damage from TNT cannons.
    • No explosive damage from other plugins, like Extra Hard Mode or Magic Spells.
    • No enderman block changes.
    • All doors may be automatically locked (optional, see config file).
    • No killing or luring animals away.
    • No stealing water.
    • No trampling crops, by players, animals, or monsters.
    • No growing trees inside the claim by planting outside.
    • No building overtop, all claims reach to the max build height.
    • No placing or breaking paintings / item frames.
    • Fluids will not flow into a claim from outside.
  • Excellent anti-spam protection
    • Warns, then mutes, then may kick or ban spammers (configurable - you choose).
    • Most spammers get only one message out before they're muted.
    • Almost no false positives.
    • Blocks server advertising.
    • Blocks repeat message spam.
    • Blocks ASCII art (ex. Nyan Cats) spam.
    • Blocks similar message spam.
    • Blocks unreadable (gibberish) message spam.
    • Blocks CAPS.
    • Blocks macro spam (very different messages in quick succession).
    • Blocks login/logout spam, even when the spammer has multiple accounts.
    • Blocks death spam.
    • Blocks bot team spam.
    • Blocks slash command spam, including /tell, /emote, and any more you add.
  • Wilderness Protection and Rollback
    • Fire doesn't spread or destroy blocks.
    • Creepers and other explosions don't destroy blocks above sea level.
    • TNT doesn't destroy blocks above sea level.
    • No planting trees on platforms in the sky ("tree grief").
    • Instant, point and click nature restoration for not-claimed areas. Watch this video.
      • Insanely easy and fast fixes for penises, swastikas, and anything else unsightly.
      • Point at what you don't like and click, and it's fixed. Even from far away.
      • Never accidentally changes blocks inside land claims.
      • No need to investigate who built it, who broke it, or when they did it.
      • Doesn't matter if the griefer built with "natural" blocks, it will still be fixed.
      • No database.
      • No backups.
      • No chunk regeneration (it's dangerous for technical reasons).
      • Fixes bad chunk generations, like floating islands. It will be better than new.
      • Fills holes, even next to water to correct big spills.
      • Smooths noisy terrain.
      • No griefer construction is safe. If it's unnatural enough to be noticeable by players, it will be removed or filled-in.
  • Land claims can't be used as a griefing tool.
    • Land claims beyond the first require a golden shovel.
    • Minimum claim size prevents sprinkling small claims to annoy other players.
    • Max claim allowance grows with time played on the server, and can't be cheated by idling.
    • It's impossible to get a player "stuck" inside a land claim.
    • A simple administrative slash command will instantly remove all of a griefer's claims, no matter where they are.
  • Catches clever griefers.
    • Enhances the /ban command to ban ALL a griefer's accounts (not just his IP address).
    • Logs sign placements.
    • Optionally, logs whispers and opens them to administrative eavesdropping.
    • /SoftMute command to shut down chat trolls without them knowing they're beaten.
  • PvP Protections.
    • When PvP is off, no setting fire or dumping lava near other players.
    • Absolutely bullet-proof anti-spawn-camping protection, which requires no configuration.
    • No logging out, stashing items, or using plugin teleportation to escape combat.
    • Optional siege mode, to answer players who hide in their claimed houses to avoid combat.
  • Supports your server growth.
    • Permit players to exchange server currency for claim blocks (requires configuration and other plugins).
    • Grant claim blocks automatically for votes, donations, etc (console command provided, other plugins required).

The Manual

More Great Plugins!

  • Anti-XRay
    • Limits how quickly players can mine valuables, based on their play time / values mined ratio.
    • Keeps your valuables in the ground, so non-cheating players can find them (unlike ore loggers).
    • Practically free to run, unlike the tremendously expensive Orebfuscator.
    • Most legit players won't notice, but xrayers will ragequit and move on.
  • Population Density
    • Automatically assigns new players to wilderness where they'll find other new players and plenty of space, wood, and ore.
    • Optional teleportation system which can't be abused by players to escape combat or save them from being lost.
    • Login queue to guarantee fairness when the server is full.
    • Optional reserved spots for administrators.
    • Automatically removes idle players when the server is nearly full.
  • EnderHoppers
    • Allows the use of Hoppers with EnderChests inside a Claim
    • Items are taken from and added to the EnderChest inventory of the Claim owner
    • Supports The Better Ender Chest Plugin

Project Status and Future

From BigScary: I've re-joined the project. Yes, I know many of you had a very bad experience with the beta builds, there were many bugs. We've rolled-back the buggy features which were added after I left the project, and then I continued the project from there as if I hadn't left in the first place. So far, I've added UUID support, greatly improved performance during play time and boot time, blocked new grief strategies made possible by changes to the game since I last worked on the project, cleaned up the config files, and tweaked several features for much improved player and administrator experiences. I've even added some new anti-grief features.

My current plan is to wait for a new mod platform to emerge ( is looking promising), then build a new grief prevention plugin for that new platform. Until then, I will continue working on this project as I always have. No other project I've ever worked on in my career as a software engineer compares to GriefPrevention's mix of fun, challenge, and importance to the community.

How to Upgrade to 8.0+ Builds

Starting with GriefPrevention 8.0.3, you can keep any claims and player data that was created by the broken "beta" builds. You just have to customize your config file again (a new config.yml will be generated in a folder named "GriefPreventionData").

Starting with GriefPrevention 8.1 which supports UUID (player name changes), GriefPrevention will do a one-time data update during boot. This can take a very long time - up to 1 second for each player who has ever played on your server. This is because GP has to contact Mojang via the interwebs to get the correct UUID for each player. At this time, it seems this process works well for offline mode and online mode servers, but there are mixed reviews for the hybrid "Bungee Cord" configuration (try it, but back-up first!). In any case, please back up before you take on this major update. If you have any problems, restore your data from backup, use the older version of GP which was working for you for now, and get your logs to me so I can investigate. :)

Coming Soon

These are my top priorities right now. It's not a complete list of everything I plan to do. :)

  • Allow owners to interact with their pets even when in other players' land claims.
  • Protect tamed animals everywhere in non-PvP worlds, with the exception of those left in other players' land claims after the animal's owner logs out.
  • Stop negative splash potion status effects from applying to players who should be protected from PvP. (Damage is already blocked)
  • Look into killer bunnies not being damageable in other players' land claims.
  • Improve boot speed for flat file mode.
  • Prevent nether portal traps.
  • Prevent placing a nether portal in a land claim by building a portal in another world.
  • Fix sand/gravel cannons.
  • Require players to move at least a block after logging in before allowing them to chat (anti-bot strategy).
  • Update /RestoreNature for new block types in 1.8.
  • Update /RestoreNature to handle water better.
  • Update /RestoreNature to regrow trees.
  • Prevent claiming land inside a world guard region unless the claimant has permission to build in the region.

I'm aware there are issues specific to modded (not CraftBukkit or Spigot) servers. I do plan to address those, but I'm waiting for Cauldron to update to 1.8.

Please Vote for Grief Prevention

I've just posted Grief Prevention on the Spigot site. If you love GP, please take a couple of minutes to give GP your rating and leave a short review. Better rating and positive reviews will help server owners who look for plugins on the Spigot site make the safe choice (GP) instead of downloading something sketchy or incomplete. :) Thanks so much for all your support!

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  • Avatar of cvxx7q cvxx7q Mar 12, 2012 at 04:00 UTC - 0 likes

    @domingo15: Go

    well yes i think so but there is more to it. ur claim will sink as far as u dig down in it. it will also always extend to sky. i used the depth in the config. A value of 256 ensures sky to bedrock coverage however this means claims will block players mining underneath so i said 32 is decent (half depth) however its upto you

  • Avatar of Memorex39 Memorex39 Mar 12, 2012 at 03:01 UTC - 0 likes

    @bigscary: Go

    I built a city in the jungle trees, 48x48, could not seed the overlap (maybe due to distance and coverage)(the string was tedious but helpful), but I finally got it to take, when I expand the city will take better notes.

    Well /deleteallclaims admin would have been very helpful and saved me alot of time, I think you have to just warn people not leave out functionality. Personally I would never give anyone that permission node as I wouldn't want my hard work undone, but then again I am just a tiny server/tester.

    Suggestions: Maybe for "overlapping claims" show columns extending similar to "precious stones", I think I would have noticed lava towers reaching into the clouds.

    When you type /adminclaims, a message tells you your in admin mode, but it seems there isn't a message to tell you when you fall out of admin mode. One problem I had happen was that when I had toggled the admin mode and go to make a claim, somehow I had fallen out of admin mode and was back to basic claims and the claim that was created was a basic player claim.

    In admin mode, I would do something like: 1st pt made for admin claim, 2nd pt made for admin claim, etc, etc. <do x, click, etc > to finalize and make the admin claim.

    Its interesting to see how all the plugins behave with each other. I like using your plugin with LWC/Chestshop/blockdoors. I can protect an admin area, which allows players to use doors/etc, then I use LWC to make certain doors/chests/etc private, and of course blockdoors is another layer of awesome door stuff and protections.

    Last edited Mar 12, 2012 by Memorex39
  • Avatar of Jayyx2 Jayyx2 Mar 12, 2012 at 02:55 UTC - 0 likes

    @Jayyx2: Go

    No I was saying that feature should be added. As an admin, we should be able to extend a users claim. Currently, that is not supported.

  • Avatar of briankdk briankdk Mar 12, 2012 at 02:41 UTC - 0 likes

    @Jayyx2: Go

    This one should help u with the proxy thing ;-)

    Seems to be pretty effective according to the comments....

    maby these 2 mods could "melt" together - in the near future ?:-)

    Found one more:

    Last edited Mar 12, 2012 by briankdk
  • Avatar of briankdk briankdk Mar 12, 2012 at 02:40 UTC - 0 likes

    @Jayyx2: Go

    im using this plugin every day...and still i feel like i dont know it.... can an admin extend a users claim ?

  • Avatar of Dr_Proffesor Dr_Proffesor Mar 12, 2012 at 02:39 UTC - 0 likes

    I noticed that if u delete a players area they dont get the blocks back

    @Jayyx2: Go


  • Avatar of Simo389 Simo389 Mar 12, 2012 at 02:18 UTC - 0 likes

    Hi, I'm currently running version 2.2 on my server (which is running craftbukkit 1.2.3).

    Currently on 2.2 we receive the 'PlayerEventHandler.onItemHeldChange' error, so we tried upgrading to 2.4 - but upon starting the server we get the following errors:

    2012-03-12 03:05:28 [INFO] GriefPrevention: Unable to load data for player "antchris11": Expected four distinct parts to the location string. 2012-03-12 03:05:28 [INFO] GriefPrevention: Unable to load data for player "brynrules29": Expected four distinct parts to the location string. 2012-03-12 03:05:28 [INFO] GriefPrevention: Unable to load data for player "bubblegumface": Expected four distinct parts to the location string. 2012-03-12 03:05:28 [INFO] GriefPrevention: Unable to load data for player "G3nesys": Expected four distinct parts to the location string.

    These continue for several hundred lines.

    Any ideas on what's going on, I understand this is a dev build - but these caused an issue resetting the number of claim blocks players had?

  • Avatar of Jayyx2 Jayyx2 Mar 12, 2012 at 00:53 UTC - 0 likes

    @Dr_Proffesor: Go

    oe as an admin, extend a users claim

    Last edited Mar 12, 2012 by Jayyx2
  • Avatar of Dr_Proffesor Dr_Proffesor Mar 12, 2012 at 00:33 UTC - 0 likes

    Since u dont have tickets set up. what id like to see is being able to claim lands for other people


Date created
Dec 14, 2011
Last update
Dec 18, 2014
Development stage
GNU General Public License version 3 (GPLv3)
Curse link
Grief Prevention
Recent files
  • R: 9.6 for 1.8.1 Dec 18, 2014
  • R: 9.5 for 1.8.1 Dec 17, 2014
  • R: 9.4.1 for 1.8.1 Dec 16, 2014
  • R: 9.4 for 1.8.1 Dec 14, 2014
  • R: 9.3 for CB 1.8 for 1.0.0 Dec 10, 2014