Is being private the only way to keep someone from joining a world and then proceeding to purposely try and fcuk it up. I've noticed on here and in some of my worlds the same guy playing this shite over and over. I have to think he has some sort of  mental problem and most probably know who I'm talking about. Does WIS not have some sort of permanent ban or automatic removal in place to keep ******** like this from aggravating 31 owners x numerous worlds? It's easy for 1 person to screw it up for everyone else and one would think the other 31 owners 25 bucks pretty much trump the *******'s.

Private worlds get to choose who can join.  It's the commisioner's responsibility to do some sort of screening on incoming owners.

WIS will ban some ID's, but these troublemakers will often just sign up under a new ID and come back.  If discovered to be the same person, WIS will ban them again, but sometimes it's not easy to determine that ID X is really the same person as ID Y.

Unfortunately, in a public league even if you get WIS to dump him from the world, they let him join again at rollover. We had a couple of unapologetic tankers (and chat jackasses) totally ruin Maris and just like Pet Semetary, they kept coming back.