Nobody trumps a wildcard better than another wildcard. This guy could call BS on a manipulative, bullying screener in a heartbeat, and my guess he could do it relatively effectively. I don't think this guy is unstable at all; he is very comfortable (literally) in his own skin and he might as well be wearing a sign that says "Not Easily Intimidated."

Then again, there are probably more than a few screeners out there who will happily take this on for their own screwy reasons, none of which are related to security.