I live in New Orleans so I don't answer my doorbell unless I know someone is supposed to be coming over. If there is a random unexpected ring, it goes ignored. Because it might be a bad person looking to do me harm. When I have dinner parties though I do answer the bell. I hear the bell ring from way back in the kitchen. I know the bell mean a guest is here and it's time to go to the front door. Then I have to walk through the house dodging guests and their drinks and food. When I get to the door I fling it open with abandon for I am having a party and I suspect the person on the other end is a friend and not a foe. I welcome the person in after I've told them to stop ringing the bell repeatedly. My friends are obnoxious that way. 
Question: Is the door locked?
Yes, because bad people could ring the bell