Had? Couldn't you just give him a lecture and let him off? That's what my stoner dad did with me. I wasn't smoking outside, I smoked in my room and blew it out my window and sprayed Oust afterward. He didn't catch me, he pulled HIS shit out in front of me and we toked up so he just said "Don't get busted, if you do don't call me to bail you out, and most of all don't fucking rat me out or I'll burn you alive in your sleep."