I’ve been very lucky over the years, as I’ve never seen one fight and I’ve only seen two people wasted beyond belief.
One quietly passed out in his seat in Buffalo. Another was harmless, but waaaay too drunk - and that was in Cincy. Both were quietly escorted away, with no issues.
The worst fan behavior I’ve seen was in Buffalo at a game vs. Denver (not too many years ago). During halftime, I saw a security guard politely and calmly ask a drunken Broncos fan to put out his cigarette.
The Broncos fan argued with him that it was BS, blah, blah, blah. The security guard calmly explained the rules, told him to put it out and quietly walked away.
Then the Broncos fan called him a stupid N word, but of course it wasn’t loud enough for the guard to hear. Pus.sy.