Out here, we know who is knocking on the door. We know all the neighbors, the mail man is sometimes a customer at the shop and the backup mail lady is a relative of a friend, used to work with the fedex home guy at a previous job, and have many mutual friends, and the UPS guy is a friend of a friend. So yeah, if someone else is knocking, or even pulling into the driveway, it's an instant heightened statye of awareness.