Well one argument is that teen brains are not done developing, and something that has a negligible effect on an adult might not be so for teenagers... even if t

Well one argument is that teen brains are not done developing, and something that has a negligible effect on an adult might not be so for teenagers... even if there are no harmful long-term effects it might interfere with schoolwork or other things that teenagers are responsible for. I have read these arguments but I don't know what the available evidence points to, this seems like the kind of thing I'd want this sort of education to cover. Alcohol and tobacco are most definitely harmful for everybody, and it's certainly possible to argue that choosing to use a potentially harmful substance is not something minors are prepared to make a reasoned judgement about. More generally, I think that showing teenagers that people who buy ads in magazines don't necessarily have their best interests at heart is a good thing!