Many people play in freerolls they are not invited to play, it is just the way it is. Usually they get bored and hopefully beaten up enough (verbally) that they participate on the site that sponsors the freeroll. Look at it that way, maybe it is a future contributing member and not the slimeball that they are. and dont let the thiefs get to you.

How does quitting or self ban help solve the problem stupid solution IMO.