The door is closed for a reason, a-hole

I'll admit it. I'm a hermit.
I prefer being alone in my room. But no one else seems to like my being a hermit. My siblings and their friends(whom are children of the devil, very loud, and have begun multiplying) are constantly coming in my room and trying to get on my computer. This wouldn't be a problem were it not for 2 things; (1) The lock on my door can be unlucked from the other side(what genius came up with that idea?) and (2) my room is connected to my brother's room by a bathroom, and I can't lock him out of a bathroom that's half his. That reminds me. The PS2 is half mine. I don't really want to play it, but I don't want you to play it either.