The kensington locks are a joke....unless the chassis of the laptop is steel, which essentially all are not.
Best way to not get a laptop stolen? Use a desktop PC! A nice big heavy one. Then, keep a small cheap netbook for going to class or portable computing, and keep that locked in a metal box or something when not needed.
IMHO that is the best method.
I'd not be too trusting of those shady campus cops....at my college they were caught stealing projectors at night, and get this (how they got caught) they listed them on ebay from their office, and were mailing them out from the campus mail room!!!
Stupid criminal alert.
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