Your basic problem is one of too much compliance on your part.

When my phone rings, I always ask myself is there anybody I can think of that I'd like to talk to more than whatever it is I'm doing at the moment? The answer is always "No." That's why God invented answering machines.

Under what law of the universe are you required to answer your door? From the tone of your complaint, I get the impression that there are only about three people in all of creation that you are willing to accept into your home. So, talk to those three people, give them a key to your house if it suits you, and disconnect the damn doorbell.

Why look for the complicated solution?

tanstaafl.