It hasn't happened to me, but it happened to my boyfriend. We were standing in line one day at the Christmas Tree Shops (for those of you who aren't familiar with the Christmas Tree Shops, they are a chain of stores on the East Coast in the U.S., and they have all kinds of stuff -- holiday decorations, household items, greeting cards, etc. -- and they are a big deal where I come from), and this man asked him if he could help him. He said, "I don't work here." The man apologized and when he left, I asked my boyfriend if he gets that a lot. He said yes. I said it must have been the jacket he was wearing (it was orange, and people who work at the Christmas Tree Shops wear green vests, so I don't know how he was mistaken for one their employees) and he said probably. Clothes might have a lot to do with it.