The modern American university (and professional) football game attracts fewer and fewer inside-the-stadium people (there’s much research and hand-wringing going on about this at the NCAA), but many schools do continue to attract large crowds of pointlessly milling drunks outside the stadium on game day. They piss in the street, get in fights, and occasionally kill each other — not that different from what some of the frats on campus get up to…
As stadiums empty, we can expect to see an imbalance between inside and out, in which a football game is played in front of no one except the band, and at the same time a massive sodden riot is staged outside the game. Universities with on-campus stadiums will have the most to lose as these marauders make their way onto the quads and into the libraries. The University of Georgia has been dealing with the phenomenon for a number of years now, so perhaps it can give other institutions advice on crowd control.