Hate to admit it, I took part in two snowball fights at OSU, each being broke up by the police. One at the architecture building that dispersed pretty quickly (it was sort of our hour of outdoor time before having to go back to our cells, err, desk for the next 23 hours). The first was way back at the old Willham. Cops called, a few snowballs tossed their way, kids chanting, "At-ti-ca, At-ti-ca". Fun for a minute but dispersed without much else. Cannot imagine anything like that escalating to chucking rocks and bottles at police.