Entitled kid brings in his dad for back up. Gets a hard lesson.

I was working nights at a 7-11 by myself (F, 18-19 at the time, late 90's Canada). I had a kid come in and buy a bunch of stuff who paid with a credit card. As I ALWAYS DID, I flipped the card over while the kid signed. He noticed that I was checking out his signature and said something flippant about it being his card. I replied that it was my job to check. He left. About half an hour goes by and I haven't thought about it at all and all of a sudden the kid comes storming in followed reluctantly by an older man. The kid heatedly explained that I checked the signature on the back of his card and his dad snaps at him "YEAH, to protect YOU, you moron!" I couldn't help but smile