I was in the same position in high school. I got busted by my parents I think 7 times and they finally saw I wasn't fuckin up with cops or in school so they let it go and proceeded to tell me how much they used to smoke. As long as I wasn't stoned 24/7 (which I was). My dad and I toke up all the time now . If you don't think they will ever let up on you though, like my friends parents never did, I think it's a good idea to lay low. Just depends on your folks, a good home is a happy home.