I left the forums for three or so months not too long after joining. When I came back, Merlin_2 had just been banned (and I was just in time to see Raptor quit). So I don't know what happened there. But before he left, Raptor had some fun...
He posted as a Guest and called himself "Merlin_2" and told everyone to "f**k off". This was actually Raptor playing a joke, but the Admin IP-banned who he thought was Merlin_2. It turned out that he had IP-banned Raptor.
(He was un-banned three days later, but he later quit because he didn't like the "upgraded" YaBB 2.1. (speaking of which, the Ex Member bug never happened on the old version TMK. :-? ))