This is really not the same problem. For the most part, the people who are going to fuck with your shit are pretty rare, so the chances that one of them will happen to be around and ready to pounce in a dining hall in a good college (and that no one else around will notice) are reasonably low.
Compare that with the internet where everyone is just as far away as anyone else, you can automate the malicious actions, and attribution is a pain.
They are the same though because most people have no idea there is even a difference. They are titally unaware. Would you or anyone else who knows anything honestly leave your laptop open and unattended?
Compare that with the internet where everyone is just as far away as anyone else, you can automate the malicious actions, and attribution is a pain.