Yes, it's a tough thing when you're facing repercussions like that. My only real advice, FWIW, is to realize that your kid is going to do what he wants. I wouldn't forbid anything or lay down ultimatums. I would explain the situation to him like an adult and discuss repercussions and hope he'll do the right thing. Backing him in a corner is usually counterproductive. When I was going through that phase, my parents tried to get all tough about it, and all it accomplished was cutting the lines of communication. The more they told not to do something, the more I did it.