I've spent most of my life on and around college campuses. Things walk off if they aren't nailed down. Even at University of Virginia, where the Honor Code was such that a violation would result in permanent expulsion, things were stolen. The thefts, of course, were not committed by students but by folk who were adept at looking like students. For skilled thieves, campuses are easy targets. Exam time or the weeks leading up til end of term are generally the worst; students are already tired and stressed. It's easy to let one's guard down for a moment, and a moment is all it takes. I witnessed a couple of horror stories predating the digital age: a grad student at one of my former unis had an apartment fire, lost his graduate thesis and the notes thereon (but he made it out unharmed, with his Precision Bass. He never completed. His experience, though, made me paranoid. I had my thesis backed up on floppy disks; I even sent a copy to a friend who kept it in her closet. My dissertation was backed up on two disks, one in my office and another that I kept at home. I hope that the student recovers the data.