Not a poll option for me, but when I lived at home, my mom knew I think but never said anything. I don't think my dad knew, but he very well could have. As long as I made passing grades, kept my job and a spot on my sport teams, I don't think they could have cared. Besides, I was so busy when I lived at home, there wasn't much time to smoke any save for a friday night after a game or sat night after a wrestling tourny. My parents were also really cool about me moving out. Shacked up with my girlfriend and her friend and they very cool with it. My sister tried to move out not too long about and they flipped out. guess I got lucky.