By Hamish Maclean of Out-of-towners and ''non-students'' ran afoul of Dunedin police on Sunday when the city's student population partied all day for St Patrick's Day. In recent years, the annual student-led celebrations have been called out for causing chaos and carnage. This year, of seven St Patrick's Day-related arrests, only one was a student. Most of the arrests were young people abusing police, Senior Sergeant Anthony Bond, of Dunedin, said. Arrests started early yesterday morning.