I take this very seriously and I'm really afraid so I always lock the door and I also have 2 hinges, then after that I check every room to see if anyone's inside the house and only after that am I able to sleep. I don't usually lock my bedroom door cos I have a light out of the room on for when I have to wake up and pee but sometimes I think of doing it; I also keep a knife on my bed stand cos you never know people are crazy
I live in a safe neighbourhood so I don't really need to but I still do. People who don't lock their doors are just stupid, the lock is there so why not lock it?
Edit: oh are we talking about bedroom doors No I don't lock those