VanilLog

VanilLog is a 100% vanilla Minecraft datapack targeted at catching griefing/raiding/etc on Minecraft servers, without affecting gameplay in any way. All you have to do is place the datapack in your world/datapacks folder. Then you'll be able to see in your server log every time a player does one of the tracked actions.

VanilLog isn't intended to stop or prevent griefing, but give admins the information to determine who may have done the griefing. I made it specifically to have as little impact on gameplay as possible, you're free to modify it to log whatever else you might want to log and if you have any suggestions please let me know, this is the first datapack I've ever made so I'm open to constructive criticism. It is also not perfect, there are probably plenty of ways to get around detection due to limitations in minecraft, such as detecting killing non mob entities not working and no stats for opening chest boats, chest minecarts, etc.

Currrently it logs:

To briefly explain how it works, it monitors scoreboard objectives for all the actions you want to log. When a player does something you want to log, the datapack summons a baby pig with a name describing the action exactly 1000 blocks above the player. It then spawns a splash potion of harming above the villager and sets the "owner" of the splash potion to the player. The potion kills the pig, and the pigs death message serves as the log entry.

If you'd like to contribute, visit https://github.com/TheAdorableCat/VanilLog