I would agree with keeping LHM off the football boards. I don't frequent the Political boards so I can't speak about his behaviour there. However, while I didn't make a concerted effert to read his posts I got the general impression that his only purpose was to make trouble. He would post different negative comments here and there, once he found a hot button that pissed people off (Note: Mangold) you would see him bring it up constantly. I could be wrong though. Screwy Lewy was on my ignore list for the majority of his tenure on BP. However, I could allways tell when he posted some nonsense, because there would be a dozen "F#$% you LHM, you don't know what you're talking about." From that point on you might as well write the thread off. So I would vote to ban him from the island, he does not seem to be interested in real conversation, just pissing everyone off.
edit: I don't know what possessed him to post "Your Mother ......" but that does seem way over the line.