There were these people back in 1984, near the Oktoberfest pond, who started shouting at each other about a disagreement over what the best attribute of a certain beverage is. It spilled over onto a nearby ride, where it got loud and more boisterous. Afterward, for no apparent reason, the combatants suddenly returned to civility, only to have a completely new crowd start arguing over the same thing! Amazing!
Actually, back in '04, I once saw some bullies try to get a kid to fight at Boomerang Bay (they were walking behind the kid, calling him slurs, throwing coins at him, but the kid just ignored them, and the bullies moved on and left him alone).