I think the operative term in there is "disruptive behavior". Some jokes are appropriate while some are done just to disrupt. It's obvious repeat trolls want attention, so we just take that away from them and let them waste some of THEIR time trying to figure out why they can't see their threads. They surely have wasted enough of ours. Unfortunately, this is VERY subjective and once so labeled, it's hard to overcome the reputation. Rather than assume the worst and ban them from the Board, we simply remove them from the threads they are trying to troll.