I have mixed feelings about this. I have the guy on ignore, and a lot of others as well. He is somewhat unique though. Some of his threads actually bring up interesting subjects. The problem is he is draining all the oxygen out of P&R by starting such a vast number of threads, many of them repetitive. It's not a problem for us regulars, who have him on ignore, but it must deter newbies or casual visitors.
I enjoy some of the less intrusive sarcasm artists, like the guy who posted all those threads calling for us to attack Israel's enemies. He has reappeared under so many different names I have lost track, but he was entertaining in a Colbert way and he didn;t start 10 threads a day.
I continue to think requiring a minimum number of trading-related posts would weed out at least some of the problem posters.