The staff has decided to ban pchaos because of repeated warnings and other misbehavior. There has been a ton of speculation about pchaos’s claim that he is a lawyer, and the staff doesn’t take a position on that because it’s not the point: whatever job he might have off the board, his behavior has gotten worse over his two months on the board. He has three formal warnings in a little more than a week and an increasing percentage of his posts appear to be trolling.
First warning and second warning for ignoring moderator instructions. Warning for trolling followed by other posts that look a lot like trolling: hilarious legal ignorance from a poster who purports to be a lawyer (earlier example here), and here he opens a Pit thread to complain that he’s being Pitted too much.