I think the AITM Classic server should have a griefer rank that cant do anything, not even chat (if possible). it should be (obviously) lower than novice, and should have no access to Main or any other worlds. There should also be a spawn world for griefers, kind of like a jail, in which they cant even build, but they can still access it. That way, instead of banning griefers, you can just kick them, demote them, and when (and if) they log on to AITM again, they would automatically be spawned in this griefer jail. It might be even better off that way, because instead of just banning the griefers, you get to watch them be tormented by having no abilities whatsoever.