I was at UMass Amherst from 04-08. Riots were occurring so regularly that they would have state police horses and tear-gas at the ready for divisional round games. Hell, there was even a riot when we lost our football title game to Appalachian State. Most of these 'riots' were just huge masses of drunk people screaming and a lot of girls going topless, with people being chosen at random to be arrested and subsequently expelled. I think the one in 03 for the loss to the Yankees had a few cars flipped and burned, but afaik, the riots during my time there were mostly just large gatherings of drunk people that the police tried to contain and control with riot gear (not to blame them - I'm sure their presence stopped the situation from spiraling out of control).