If we cannot see who is there from the window, we don’t answer the door. Similar for landline phone, we use a 24/7 answering machine, if we are in and we want to speak to the person beginning to talk, we pick up.
Why? We are both of a nervous disposition and really hate cold callers, of which we get many.
Sometimes I think maybe we should get a CCTV thing installed, but I’d rather it was made illegal for bible bashers and cold callers to knock on our door, if we sign up to a scheme and/or put something on the door.
I would love to have a note on the door that stated that an unwanted door knocker will have a bucket of old fish tank water thrown in their direction, but I fear this may have repercussions! 😆