Not to belittle the poor victimized homeowner here, but it’s amazing how many people are stupid enough to go answer the door in the middle of the night. This isn’t 1975 any more, we don’t have to go answer the door in person; answering the door in person is a great way for someone to shoot through the door while you’re looking through the peephole or advertising your location by speaking through the door.
Me, I’m sitting back in my bedroom, defensive shotgun ready to go and using *my phone-operated external camera system with two way audio* to address whoever is out there. People outside the house have no idea where I am or if I’m even at home. They won’t be able to shoot through the front door and hit me because I’m not there. I won’t have opened the door and thus given anyone with ill intent (badge or not) the opportunity to do me harm or barge inside.
Camera systems are cheap and easy to use. I’m not going to deliver myself to someone violently banging on my door just to see what’s going on.
Well, if it's the cops ya never know. It could be a fire and their waking up homeowners for evacuation, could be pursuit of a felon which stopped 2 doors down from your house and your home is now within the search perimeter, they could be bringing news of a death in the family, or they could be seeing smoke emanating from your own home... who knows....