A friend of mine actaully said this once when he was playing wingman for me and was unhappy with the girl he ended up with.
After several minutes of chatting with these two girls the introductions started. When it came to my friend, he says, "My name is John Smith (used actual name), have you heard of me?"
They said no. He replies, "Thats weird, I just moved to the area and I thought they were supposed to alert the community when a sex offender moves in"
The girl I was talking to realized he was kidding and actually thought it was funny but her friend did not and we both ended up leaving without the girl but laughing all the way home.