He kept bitching about tony's harvest thread and people tried to intervene to tell him how unhealthy his obsession was. He was mentally incapable of conceding and leaving with some small amount of dignity left, but instead he burnt all his bridges with everyone, cranked up the "stuffpost in the harvest thread" dial to 11, got banned for something and then left.
He came back a little while ago because Tony namedropped him, which means that he's been lurking the harvest thread waiting for somebody to talk about him. Kinda sad, really.