Saturday evening I was home alone; I hadn't locked the back door yet because I needed to bring the dogs inside. All the lights were out except for the computer monitor (why waste electricity?) when a woman opens the door and asks if this is 'neighbor's name' house. Even as I told her it was across the street I was thinking how bizarre to walk into a dark, strange house. Even if she had been fairly certain she had the right address, she couldn't have known the neighbors well enough to walk in without knocking since she obviously hadn't ever been there before.
The doors stay locked now.