He's very unreasonable. Like Limn said "failure to believe anybody but himself".
I was arguing with him in a thread but the thread got closed. So I sent him a PM asking him to reply to the thread in a PM. He kept misunderstanding me, so I kept explaining. End result was him telling me to get a life. The purpose of it all was trying to find out if our discussion was simply miscommunication or if he really is just plain stupid.
I've got my answer though with shit like this:
Me: "But like you said, if you're not concerned just don't reply to this PM."
Him: "And you're like a fucking kid, man. "If you don't want to reply to that thread, don't send a Pm back". I'm not replying to the thread, I'm replying to your fucking PM's."
He twists a lot of things around. I'm not sure if I agree with saltynuts that he does it for the purpose of making himself look good. I think he honestly has comprehension problems.
His stupidity leads to a lot of arguments and annoyance on the board but he hasn't really broken any guidelines. People can just put him on ignore I guess, which is what I've done now.
I don't like him at all but I don't know if he should be banned.