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.

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.

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  • Avatar of dutchrastacraft dutchrastacraft Oct 22, 2014 at 15:21 UTC - 0 likes

    @bigscary: Go

    No, not underwater. Just trying to claim with my shovel, I have to click the block to get the corner blocks. Should I reset my config or something to get it to work again? Or is there no setting?

  • Avatar of Johndonne Johndonne Oct 22, 2014 at 10:46 UTC - 0 likes

    Reading the comments below, i have seen that there are possibly some problems present in the most recent updates to this plugin which may have an impact on my server.

    I am using the 7.8 BETA build on a 1.7.10 unmodded offline server. Using the latest build (8.5.1), are there any known problems regarding 7.8 migration into 8.X and offline mode player data (Reading comments, i found things about claims being turned into admin claims etc), or any other problems at all?

    I am using the 7.7 build on a 1.7.10 Pixelmon v3,2,9 offline server. Using the latest build (8.5.1), are there any known problems regarding 7.7 migration into 8.X and offline mode player data (Reading comments, i found things about claims being turned into admin claims etc), or any other problems at all? As you may or may not know, before the arrival of the 8.X builds, many pixelmon servers used 7.7 instead of 7.8 BETA as players could not battle pokemon within admin or player claims. Will 8.5.1 still allow battling of pokemon within admin or player claims?

    Basically, will the update to 8.5.1 work as intended for each of said servers and present no known problems.

  • Avatar of Turbotailz Turbotailz Oct 22, 2014 at 10:26 UTC - 0 likes

    No more /gpreload?

  • Avatar of Sinuce Sinuce Oct 22, 2014 at 07:51 UTC - 0 likes

    Bug report: "Could not pass event PlayerInteractEvent to GriefPrevention v8.5.1"

    When right-clicking with a stick in a subdivided claim, console prints this error:

    I experience no errors in-game, though.

  • Avatar of Sinuce Sinuce Oct 22, 2014 at 07:41 UTC - 0 likes

    @bigscary: Go

    I... can't click the Donations link at the top of this page. Is it dead? ._.

    I tried upgrading from 7.8 (I think it is?) directly to 8.5.1, to see if my claims still didn't get converted unless using the method, I mentioned in my previous post some days ago.

    But this time it worked! Seemingly flawless. :O

    I'm uncertain whether I simply made a mistake the last time, or if the issue has somehow been fixed (I didn't see any such mention in the Jenkins changelogs, though). If the former, I am sorry to have reported said mistake >_<

  • Avatar of ClimacticGaming ClimacticGaming Oct 22, 2014 at 04:38 UTC - 0 likes

    I love this plugin so much and have used it for over a year on various servers. Unfortunately, I am having trouble with modded doors. In your config, on this website, it doesn't match the style in the config we get when loaded on to the server. Your config says it would look like this:

    Mods.BlockIdsRequiringAccessTrust: [1, 2, 3]

    But in my config (I have the newest version you just released 8.5.1, it looks like this (with my modded doors added in) am I doing something wrong?

    With the stars (wildcard) in between the : : below, but its not showing

    - 5384::Bamboo Door
    - 4948:
    :Carpenter Door
    - 4373::Natura Doors
    - 5419:
    :Malis Doors
    - 5420::Malis Doors
    - 5421:
    :Malis Doors
    - 5422::Malis Doors
    - 5423:
    :Malis Doors
    - 5424::Malis Doors
    - 5425:
    :Malis Doors

    Last edited Oct 22, 2014 by ClimacticGaming
  • Avatar of bigscary bigscary Oct 22, 2014 at 03:56 UTC - 0 likes

    @BlazeCraft7777: Go


  • Avatar of BlazeCraft7777 BlazeCraft7777 Oct 22, 2014 at 02:54 UTC - 0 likes

    i'll work today and tomorrow and then i will donate probably 100$ you guys deserve more though.



  • Avatar of BlazeCraft7777 BlazeCraft7777 Oct 22, 2014 at 02:54 UTC - 0 likes


  • Avatar of bigscary bigscary Oct 22, 2014 at 02:43 UTC - 1 like

    8.5.1 Updates

    • Fixed "/trapped is always on cooldown" bug by removing the cooldown entirely.
    • Performance update for the very frequent player interact event.

    @dddylan98: Go

    Sorry but no. :( There's a big warning about that in the setup page. You can move from flat file to SQL, but there's no going back (except by restoring a backup of your data from before you made the switch to SQL).

    @dutchrastacraft: Go

    Couldn't reproduce the problem you described over here - were you underwater maybe?

    Last edited Oct 22, 2014 by bigscary


Date created
Dec 14, 2011
Last update
Oct 22, 2014
Development stage
GNU General Public License version 3 (GPLv3)
Curse link
Grief Prevention
Recent files
  • R: 8.5.1 for CB 1.7.9-R0.2 Oct 22, 2014
  • 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