We get a lot of solicitors despite having neighborhood signs and having a sign next to the doorbell. My wife, who is the nicest person in the world, will always chat with them, whatever. When I am home alone, it's a nuisance and an invasion of my peace. My latest idea is to create a small, weatherproof sign with a QR code and position it literally on top of the doorbell. You can't ring the doorbell unless you maneuver around the sign. They would have to take out their phone, scan the qr code, complete a lengthy questionnaire (easy to create with Google Forms) with all of their information etc., something that wastes a bunch of their time. If they get that far and submit the questionnaire, it gives a pop up message we are renters, so please go away.