Good point.
The guy is really an idiot, though. To steal from someone in your own dorm is just stupid, given that people are going to know that the dudes PS3 on floor x was stolen, and you conveniently got a PS3 on that day. I mean, I'd say that 60% of the people in my 6-story freshmen dorm were extremely high on any given day, and we probably could have deduced that something fishy was up.