No sports fans have anything on Philly fans. Those people are mentally unstable.
Never been to a Jazz home game, have you? Walk into the Delta Center (sorry, I'm not dignifying the idiotic name that stadium currently has by typing it) during a home playoff game, and (to paraphrase Ernie Hudson in Ghostbusters) "you'll see things that would turn you white!"

Seriously, that place gets so legendarily loud and crazy that ear plugs are pretty much required if you ever want to hear again.