Is it possible to disable this in a sertain world? That would be great! If it's not possible pleeeeease add it then! I run a server with a hardcore faction world and a peaceful world without griefing. I have grief problems there :(... This is an awesome solution! If you can prevent it in a sertain world. Please let me know as fast as possible, thanks!

Add the world name to the World Blacklist. This is already supported.

Like GubiD said, or you can do it per field using the allowed-worlds flag.