At our office, the restrooms are the kind of room where there is only one commode, and one sink, and when you go into the room you lock the door behind you. If you don’t lock the door behind you, you could be embarrassed if someone opens the door. No privacy stall or wall of any kind. I was taught that when a door is closed, you knock on the door before you open it, and wait a moment to see if anyone answers before you open the door.
Well, at our office it appears that no one else was taught that because everyone simply tries to open the door, without knocking first. I am always annoyed when I am in the restroom and I hear someone trying to turn the doorknob to come in, without knocking first. I think that is very rude! I always call out “just a minute” but I still think it is very rude!