Grief Prevention

Grief Prevention

AUTOMATICALLY PREVENTS ALL FORMS OF GRIEF, including build/break, theft, spam, fire, spawn camping, lava, treetopping 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 using crafting equipment.
    • 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 bans (configurable) spammers.
    • 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 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.
    • Griefers can't dump water or lava above sea level, unless they claim the land first.
      • The fluid will not flow out of the claim.
      • Deleting the claim removes the fluid to prevent spillage.
    • 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.
  • 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 added necessary anti-grief features for new game elements (leashes, hoppers, mounts). I've also added UUID support, and the current focus is improving performance - see below for how you can help!

Because all of the Bukkit staff have simultaneously quit the project, it's extremely unlikely that Bukkit will ever be updated to support Minecraft 1.8 or later servers. Also, there's a legal issue which resulted in all craftbukkit builds being removed from the internet in general. The law is slow, so that makes future bukkit versions even less likely.

Due to these circumstances, 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, Tux and I will perform the minimum maintenance needed for this project, which includes fixes for grief (including UUID support), bug report investigations, and bug fixes. Depending on how quickly the sponge platform gets ready to go, there may be time for me to slip in some minor tweaks here and there as well. There will be no major feature adds (like new config options or per world configs).

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!). I'm not sure how GP can make it work for Bungee configs 100% correctly - if anyone has specific information on how solve this problem, please share it.

Please read! I need your input/help.

I'd like to redesign the bucket limiting option.

Players don't like that they can't dump water to water their farms in the early game, before they have a golden shovel to claim their farm separately from their house. Yes, they can work around this by farming on top of or under or in their house, but still they don't like it. When players don't like it, admins hear about it, and admins don't like that.

The reason for the current rule about not placing water outside of land claims is twofold. First, griefers can use buckets to make a REALLY big mess with only a few block changes (due to water spreading mechanics). Second, it's expensive for grief prevention to track the flow of fluids, which means server lag.

I would love to hear your ideas on other approaches to preventing griefers from griefing widely using buckets while still allowing players to build their ideal farms in early game.

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  • Avatar of jaime29010 jaime29010 Feb 21, 2014 at 22:22 UTC - 0 likes

    I love this plugin, thanks you developers for creating this amazing plugins

    Last edited Feb 21, 2014 by jaime29010
  • Avatar of TheOcelot4000 TheOcelot4000 Feb 21, 2014 at 19:14 UTC - 0 likes

    Ps me server is 1.7.2

  • Avatar of TheOcelot4000 TheOcelot4000 Feb 21, 2014 at 19:13 UTC - 0 likes

    PLEASE help me i CAN"T INSTALL IT i know how but it won't work please help. PM me if you know how.

    Last edited Feb 21, 2014 by TheOcelot4000
  • Avatar of anfereon anfereon Feb 21, 2014 at 10:30 UTC - 0 likes

    @ViperViolist: Go

    I had the same problem, because some settings get automatically changed in config. Just change all the config files to read-only.

  • Avatar of fungreenfox fungreenfox Feb 21, 2014 at 00:35 UTC - 0 likes

    At my server, players can't event store their claims into the mysql data anymore. I have to find a solution.

  • Avatar of Smac3223 Smac3223 Feb 21, 2014 at 00:08 UTC - 1 like

    Are we ever gonna see an updated version of Grief Prevention?

    Seems like it's just been dev builds for quite some time now. After last times horrid bug that deleted claims I'd rather hold off on the buggy dev builds till a stable one is released. As it stands my server is still running on the 7.8-beta-b213 and claims in 'The End' simply do not work. Upon the daily restart they just vanish. No idea why..

    Anyway is there any sort of ETA?

  • Avatar of fungreenfox fungreenfox Feb 20, 2014 at 23:11 UTC - 0 likes

    Now i just wonder, how many dev builds do i have to step back, to get rid of the error [00:05:03 INFO]: [GriefPrevention] Unable to save data for player Fungreenfox. Details: [00:05:03 WARN]: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''name','lastlogin','accruedblocks','bonusblocks','clearonjoin') VALUES ('Fungre' at line 1

  • Avatar of fungreenfox fungreenfox Feb 20, 2014 at 23:09 UTC - 0 likes

    @pr4xt3roy: Go

    /giveclaim requires owners right the property. So he/she can only give own claim away.

    /transferclaim is an admin tool, can transfer any claim.

    Last edited Feb 20, 2014 by fungreenfox
  • Avatar of SuperPyroManiac SuperPyroManiac Feb 20, 2014 at 22:49 UTC - 0 likes

    This is weird, it seems to block only 1 thing from everyone including me with all permissions, whenever I post my own website it is blocked for "spam" yet I can post ANY other site.

  • Avatar of pr4xt3roy pr4xt3roy Feb 20, 2014 at 22:06 UTC - 0 likes

    Quick question...

    If an admin can transfer anyone's claim using /giveclaim, then what is the purpose of /transferclaim ?

    the way I understand it, /giveclaim would be for users and /trsnsferclaim for admins... but they seem to do exacly the same no?

    The only difference I see is that using /transferclaim without any parameter will transfer a claim into an admin claim. But /giveclaim could do that too (when you have proper permissino) and you would have one less command to worry about.


    -- pr4xt3roy [ Survival / Strong Anti-Grief / Build / Make Friends ]
    Minecraft Server IP:


Date created
Dec 14, 2011
Last update
Oct 19, 2014
Development stage
GNU General Public License version 3 (GPLv3)
Curse link
Grief Prevention
Recent files
  • R: 8.5 for CB 1.7.9-R0.2 Oct 19, 2014
  • R: 8.4 for CB 1.7.9-R0.2 Oct 17, 2014
  • R: 8.3 for CB 1.7.9-R0.2 Oct 14, 2014
  • R: 8.2.3 for CB 1.7.9-R0.2 Oct 10, 2014
  • R: 8.2.2 for CB 1.7.9-R0.2 Oct 09, 2014