The chaos at the University of Massachusetts this weekend during a pre-St. Patrick's Day celebration brought new attention to the old problem of how colleges deal with alcohol-fueled revelers during the March festivities. Celebrations near the UMass campus in Amherst spiraled out of control Saturday as police dealt with thousands of drunken and unruly people during the annual ``Blarney Blowout.'' The Umass Chancellor says that such violence is not going to be tollerated.