I'm all grown up and have a kid, I didn't stop smoking... and if my son wanted to smoke when he turned 16 (with good grades only), I believe I might smoke with him ...I would school him on how you just smoke when you are ending your day and you want to wind down and relax ....don't let it fuck up your grades and don't let it diminish your ambition. I would tell him that the only way I will condone his smoking weed would be if he ONLY smoked at night (with me)...and maintain your grades.