Let it go. They’re going to make really stupid choices. I drank AND smoked in high school. We all go through it. They need to be able to trust you and rely on you. They’re navigating the world and they need a safe harbor. Be that safe harbor. It’s more important than fighting over stupid behavior. Let them know you don’t approve - sure, but fighting over stupid stuff is just going to make you both bitter.
Sometimes you’ll be in the wrong side of history. When you discover you’re wrong, move to the right side of history. When I first started training as a nurse it was the early 1990’s. HIV/$@!#% was pretty new. I remember telling my fellow student I would double glove and take any “over the top” precautions I wanted to. That was my fear and ignorance talking. Amazing how cozy self-righteousness makes you feel. I was wrong. Always look at the issue through the lens of humanity.
“Open your eyes and see what you can, until they close forever.” - All the Light We Cannot See by Anthony Dorr. See the world! Learn science, appreciate art and books, meet people and be genuinely interested in them. Engage in the fight for justice, resist fascism and dictators. Share what you have and who you are. Putting up walls is a waste of time. Yes, there will be pain. But you will be able to face it with grace, grit, courage and with the love of others. Make love! But remember if they’re too drunk to drive, they’re too drunk to consent. And be sure you’re both on the same page so you can avoid misunderstandings and hurt feelings (yours and theirs). Don’t kiss and tell. Be protective but never possessive. Just be a man, you know? (man/woman/grownup human.) Be safe - $@!#% is forever.
When I say I want you to be happy I’m not talking about pleasure and ease. I mean purpose and pride you in yourself, meaningful work, and a solid group of friends and family who loves you for who you are, so you don’t ever have to pretend to be something you’re not.
Awesome game we did at preschool - play I SPY. Try with objects or emotions, such as "I spy something sad" or "I spy something joyful." To help him learn empathy.
Consider the source. Consider whose company they are in. You may not know much about issue xyz but look and see who endorses them. If people you trust place trust in them.
Jump in and help where help is needed. Don’t wait to be asked. Whether it’s clearing dishes at home or friend’s house or tasks at work. It could be something big like solves problem or little, putting paper in the copy machine at work.
Check out fencing. Local fencing club has classes for kids and adults all ages. They also do birthday parties, so that might be something different that would be fun for him and his friends.