Currently a video doorbell can pop up a picture on your phone so you can make the same decision. Most can also act as an intercom.
My first reaction was to like the idea as a nice extension to existing functionality, I don’t see it working.
Someone you don’t want to see has no reason to be honest: solicitors are already in a gray area trying to trick you out of your money and there’s no reason it would stop here
Someone you do want to see may be annoyed and discouraged at jumping through too many hoops. You’re not that important to deal with that
Currently a video doorbell can pop up a picture on your phone so you can make the same decision. Most can also act as an intercom.
My first reaction was to like the idea as a nice extension to existing functionality, I don’t see it working.