The other day we had a visit from the parents of a neighbour. We don't know the parents well. About 2 hours after they left, Facebook had a new friend suggestion for me - the mother of my neighbour. It wasn't a friend request, from the person, it was a suggestion from Facebook. Since this woman and I have no electronic connection at all, I can only conclude that Facebook knew she was in my house - perhaps she had her cell phone on. I think she would find that just as creepy as I do.