Help! ds, nearly15, locked his bedroom door rather obviously after furtive behaviour. Checked later and found stuff belonging to shush a pipe smoking, including charcoal wrapped in tin foil, the pipe etc... Read up it is more dangerous than cigarettes. Does this in his bedroom with a couple of friends from school Tuesday afternoons when I'm at work. Found suspicious ash in toilet etc. he always gives me BS excuses on stuff I find. He'll be home soon, what should I say?