Arm yourself. You don’t have to open the door and have a confrontation but with strangers at your door you should arm yourself.
Anytime my doorbell rings, it's someone I'm not expecting.
Some days I answer with my AR-15 in my hands. Some days it's my 45acp and the rest of the time it's with my shotgun.
I don't know why people tend to leave my property in a big hurry. I was just cleaning and checking my firearms like any good firearm owner would in today's times. Have to be ready for the STHTF.