I don't ride an expensive bike ('87 Schwinn Tempo converted to fixed gear) but it's still my only bike and I have no choice but to ride it to class since I can't afford smog fees/registration/insurance for my truck at the moment. The campus security guards tell us we have to park our bikes at the racks near the parking lot but I just take my bike to class and either U-lock it to a handrail in the hall or lean it against a wall in class if the professor allows it. Colleges are notorious for bike thieves since most thieves know they're littered with bikes and most people don't lock their bikes up properly.