There's been alot of problems with griefers on the skyblock server, especially with mobs involved. I've had hundreds of mobs only to have them get killed by griefers; 7 times. I suggest there should be some way of stopping people from killing certain mobs on other peoples islands. If that's not possible, then there should be some way of tracking what a certain player has killed so they could be tracked down. This could potentially stop lots of griefing on the server.