Pirating is not theft, it's copyright infringement.
That's what was particularly vexing about those anti-piracy commercials, where they were like "YOU WOULDN'T STEAL A CAR! PIRATING MUSIC IS THE SAME AS STEALING A CAR!"
It's fucking not because if you still Bill's car, Bill now has 0 cars, while you have 1. Theft. Whereas downloading music, Bill still has his copy of Country Western Christmas Classics, and now so do you.
More than anything it's the underhanded dirty tactics that Record companies employ to stop people from downloading, that have made me pro-piracy. They brought this upon themselves.