Hubski, have you ever been scammed? Have you ever had someone put one over on you for a profit? Have you bought something only to find out it wasn't what was sold to you?
When I was in high school we used to scam food from the fast food joints. We would bring in an old receipt, often one that we found outside or from a friend who really did purchase things and bring it back and say it was a messed up order when we got home. More often than not we would end up receiving the same order again for free. A total scam for our munchies.
The best was when a friend worked at a pizza joint. He approved our "scams" almost daily.