He was banned because he sent me a rude personal message saying that he would not listen to what I say and that he would continue to poke shots at Gill. So, yeah I banned him because of what he said he would do, and if I catch him doing it again I will ban him even longer.
He acts like banning somebody to prevent future disruptions is bad, when it is not.
He's very immature and doesn't know how to handle situations; judging by his behavior during the chess game, the angry pm he sent me because I told him to stop bickering with Gill, and the current user name and signature he has.
Here's the pm, I posted it in the public staff thread earlier.
Spoiler, click to toggle visibilty
In short, don't take his long personal messages of personal insults too hard. You're not too involved to ban him. He's being a dick because he's accusing people of ridiculous things yet he fails to see the problem, himself. It's common for people to want to blame their faults on other people. He is wrong, he is not in anyway right at this point.