A favorite on /r/askreddit, or at least it seems that way to me.
I only have one, and it’s not very entertaining.
I was on a bus going to work. A few stops before mine the bus gets cut off by another bus. The driver started yelling at the other driver then pulled over and got out of the bus to, I assume, escalate the conflict. We were near my stop anyway, so I got off before things could get hairy.
I find a lot of German footy fans to be reasonably well behaved, despite the booze. It does depend on the team. Same for teams from other countries, I suppose. There was a bunch of Swiss fans (from Bern, iirc) a while ago who all dressed and marched like Proud Boys and sang songs that were absolutely terrifying. Their team lost. Karma.
Bundesliga (1st league) is civilized in Germany.
But in the regional leagues, as the quality of the football goes down, so does the quality of the fans.