I once had a customer yell at me because our store (a Fry's Electronics) carried porn. She said we were providing a safe haven for pedophiles. I told her all of our adult movies are legal and contain only adults, not children. She asked to speak with a manager, so I took her to the store manager. She gave him the same speech, and he told her that she was free to write a letter to our corporate office, because we weren't going to stop selling porn. As soon as she left, me and the manager looked at each other, rolled our eyes, and went about our business.
I'm just glad she didn't also notice the magazines, which (unlike the strictly organized DVDs) have a habit of getting mixed together with the copies of MAD Kids and Nickelodeon Magazine.