For decades, students at Michigan games were assigned seats, with the seniors getting the best ones. But for some games last year, a quarter of the 20,000 or so people in the student section were no-shows. So, athletic director Dave Brandon decided to switch them to general admission – first come, first seated -- to get them to show up on time -or, at all. The students went ballistic. Yes, some can display a breathtaking sense of entitlement, and they won’t get much sympathy from the average fan