The last time mine range at 2 am I got out of bed, 1911 in hand and looked through the front curtain since you can't see through my solid front door. When I did I got a flashlight in my face. This didn't make me feel very well at all until the voice behind the light said, sir this is the Police, and he shined the light on himself.
By this time I had moved into a different position, made it known I was armed, and could clearly see several others out front as well as a couple of patrol cars.
When I opened the door the officer asked if I had put the firearm away, and proceeded to enlighten me to the fact they had a teenager in custody that my neighbor had caught breaking into one of our vehicles.
All said and done, the neighbor had come in from work late, and the kid simply jumped into the back seat and tied to hide. Well the neighbor having a CCW, pulled his cell phone out, called the police, and held the fellow until they arrived a few minutes later. The end result was the kid had gotten into several other car along our street. The officer asked if there was anything else he could do, and asked if I wanted to speak the the fellow.
When I talked to him he was a VERY scared kid around 13 or so, just into a little mischief. I told him how VERY lucky he was that things turned out as well for him as they did and that he should consider this a learning experience and straighten his life out right now. It could have easily have gone down several very worse ways, especially had he tried to confront the neighbor or even myself had I been aware.
I never answer the door without looking first and from one view I can see who or what is on the porch. The door isn't going to simply be kicked in, we had it replaced with a commercial steel one and the frame reinforced extensively. So if the bell rings and I don't like who is there they get a warning first, if it doesn't ring, but the door is being kicked, well it had better be the fire dept with lots of flashing lights going on or things are getting deep quick. The response time here is about 2-5 minutes due to our proximity to the central station, and if gun is mentioned in a call it is cut dramatically.