I remember when I was told that I can't sell alcohol to someone if they're with someone who appears to be under twenty-one (I work as a cashier). So, I see this stupid girl come walking over with her dad, and she was carrying two Bacardi Breezers, and her dad was carrying a newspaper, I believe.

Me: "Do you both have ID?"

Idiot Dad: "ID? What are you talking about!? I'm buying this."

Me: "I need ID from both of you."

Idiot Dad: "Oh, get a life mate!"

I wince and let them have the alcohol as I wasn't prepared to converse with a being of such low intelligence. Then as they're walking away, he says...

"Yeah, yeah, the alcohol was for me and the newspaper for her."

This is a reason why I hate my job. But I'm just going to refuse a sale next time this happens.