Also, a friend of mine absentmindedly locked his bike to a rack through someone else's bike once. When he came back, his saddle/seatpost was gone (ol' quick-release). He spent the weekend figuring out what kind of seatpost he needed to replace it, finally made the walk down toward the bike shop and went to get his bike and his seatpost was back.

Seems the guy just wanted my friend to walk if he had to walk.