I do not. I only answer the door for packages being delivered, food delivery, and friends. I look out a 2nd floor window to see who it is.
A lifetime of answering the door has taught me that anyone who is not doing one of these three things wants:
B) To tell me about Jesus.
I'm not going to give you money. Ever. And I don't like talking about Jesus to complete strangers. When I lived with my parents it was always a "just in case" thing. Older people seem to ring doorbells more (I just call their phone if I'm outside someone's house), and I was never sure it if was someone for them.
It never was. It was always someone wanting money or religious conversion.
So what about you? Are you a creepy recluse peeking outside a window to see if the person on your doorstep is annoying or not? Or are you a decent, normal human being who will open the door?