I once "stole" a banner from a train. One of these commercial cardboards they put up every week. It was a poster from a movie I wanted to go see.
I'm sure it's legal, but I felt really bad about it though.. when I came home my dad made jokes about it: "you STOLE it from the train"
I still have it. Had it up at the wall for 5 years or so. Must have been the most displayed commercial in years
I could never steal something for real.