(I am signing to a deaf couple, asking them if they need help. Before they can reply, a customer interrupts me.)

Customer: *gasping* “You’re in a gang!”

Me: “What?”

Customer: “I saw you! You flashed them a gang sign!”

Me: *laughing* “No, ma’am, it’s ASL.”

Customer: “I don’t care what your gang is called. It’s people like you that make me scared to go out at night!”

(She leaves with her purchase, which turns out to be a shirt that says “B****es Get Stitches.”)