16 year old son, lots of freedom and trust till now. caught with loads of dope and nearly expelled. exams looming. tried to impose new boundaries - ie not staying out all night every weekend, and doing some revision. he's gone ballistic refusing to have his freedom curtailed, refusing to cooperate or negotiate. I was going to buy him a festival ticket as reward for cooperating and working for exams, but he calls this blackmail, so - no ticket, but no progress on firmer boundaries either. where do we go from here? so worried about his attitude and future. thanks