Fans fighting in the stands at sporting events. Is it getting worse?

[packman]

5. Goes WAY back - To the point of a state-sanctioned slaughter of the fans

In 531 some members of the Blues and Greens had been arrested for murder in connection with deaths that occurred during rioting after a recent chariot race.[5] Relatively limited riots were not unknown at chariot races, similar to the football hooliganism that occasionally erupts after association football matches in modern times. The murderers were to be executed, and most of them were.[6] But on January 10, 532, two of them, a Blue and a Green, escaped and were taking refuge in the sanctuary of a church surrounded by an angry mob.

Got so bad Justin, the emperor of Constantine, closed the doors to a chariot race, sent in troops and killed as many of the Blues and Greens as he could (stopped future sport riots)

https://en.wikipedia.org/wiki/Nika_riots