This didn't happen to me, but it happened to my little sister who works with me.
My sister was working, but I had the day off. Since she's too young to drive I went to pick her up from work at around 9:15, since we close at nine. After about ten minutes, I saw a man walk out with a big pile of frames and leave. I remembered him because he's always coming into the store ten minutes before closing and trying to flirt with all the girls.
When she finally got out of work, she told me that he wouldn't leave no matter how many times they reminded him they were closed, and he made her ring up every frame as a separate purchase. He flirted with her the whole time, which is enough of a problem since she's still jailbait, and hes at least twenty-five years older than her. The worst part though, was that after he was done, he gave her a piece of candy for being so "sweet".
I thought after sixteen years I wouldn't have to worry about giving her the "Don't take candy from strangers" lecture.