Yeah, I think most parrents do know that there kids smoke weed. Some of my freinds are super parinoid about it and get all there body spray and eye drops and still its pritty obvious that there parrents know when they keep saying there parrents have no idea. I dont try to hide it with my parrents i just tell them I smoke weed, not realy sure if they beleave it or not but it works fine to keep them off my back.