My parents know I smoke. They're main concerns are A) getting in trouble with the law B) Switching to harder stuff C) Driving High D) getting involved with the wrong kind of people E) Setting a bad example for my little brother. My dad said that if I could find a situation where all of these could be avoided then he had no problem with me smoking. So I only smoke nights and at friends homes. It's worked out fine because I don't feel any need to try harder stuff if I've got some weed handy, I don't have to drive or worry about the police, and my brother don't have to see me stoned (though if he did he'd probably not realize I was actually stoned.) So props to my parents for being smart and stressing the values of balance.