I have a 15 year old DS who has taken it upon himself to fit a bolt type lock on his bedroom door. I really don't like it, find shouting through a locked door irritating and my gut feeling is to remove it, but I am aware of my DS's need for privacy. He says he needs it to keep out his toddler brother who interferes with his things and for general privacy. However, i'm sure he also wants it on so he can get away with screen activities late at night when everything should be turned off.
What are other Mumsnetters' opinions of teenagers being able to lock their bedroom doors?