I don't answer the door unless the caller knocks more than once. If it's only one knock, I assume it's someone dropping off a package or asking for money, which

I don't answer the door unless the caller knocks more than once. If it's only one knock, I assume it's someone dropping off a package or asking for money, which accounts for about 95% of cases. If I do answer the door, I'm almost never glad I did, though. My neighbors have my number, and generally text me before coming over. My thought is that you knocking on my door does not oblige me to stop what I'm doing and answer it, any more than someone saying, "sir, do you have a minute for..." while I'm walking down the street obliges me to stop and hear their sales pitch, or seeing an unknown caller on the phone means I ought to pick it up.