I told my mum that i smoke and she's cool with it, my dad has walked in on me and my buddies packing a bong, but he never said anything, also the other day when i was stoned i left the box from my scales in the bathroom and he found it. He just said is this your box and i said yea and that was it. He knows i've tried it and he doesn't care. I also knows he smokes hash because my mum gets it for him lol but he doesn't know i know that. I guess depending on your parents it's a choice to tell them you smoke or not.