Our bedroom door is parallel with the hallway, not perpendicular. You can't tell if the door is open or closed from the rest of the house.
It's a good idea to keep a safe defense instead of attacking.
Somebody on another site said if someone is trying to break through the deadbolt and chain on our door, to start shooting through the door before the BG even makes it in the house. I'm not so sure this is a good idea from a legal defense standpoint, unless I follow up by dragging the body inside the house.