I've worked retail. This happens every day. My favorite one was when my sis and I were chilling outside Best Buy and this dumb woman couldn't figure out how to get the doors to open. My sis gave her a snarky comment and she tried to report us, thinking we were employees!
Awesome. You know, one thing I have is that my co-workers don't recognize me without my work uniform and the same goes for the customers. Well, most of them. I can be an ass as soon as I end my shift and they don't even know it's the same sweet little girl, who helped them find that item they were looking for.