Quite sensible advice sobriquet. I think my brother sort of knows I do..he always says shit, but I don't know if he really knows. He's younger though, so he can't really do anything, plus my parents know. It's bothersome, and they don't like it, but I think they're mostly over it now. Except now every time I forget something, I dread her saying "Oh, it's because you smoke pot" and whatnot. The plus side is now they can't find out about anything. So I'm less paranoid.

Anywho, good luck with the situation man. If he's gonna blackmail definitely stash some crappy stuff in his room and a little bit, and move your stuff to a friends, and rat on him. Heheh, take that bastard down.