Even the police and PDHPE teachers know they cant tell teenagers not to drink, they can only them of the risks and educate them in the best possible way to handle the situation. However, I still think that is not enough. That is stupid. They should try to scare us so bad, that we wont dare to attempt the "underage party scene." 
When we were 15/16, we got invited to our friend's 18th. Since that day, I found I was surrounded by  people who were heavily into the party scene. 
They were sneaking out every weekend, and going to parties of strangers, drinking heavily and being swayed into the drug scene.
I just dont understand it. 
We've spent our entire lives being spoken to by parents, teachers, the police, social/youth worker and numerous other forms of guest speakers telling us stay the hell away from drinking, from drugs, from succumbing to peer pressure.
Yet, I sit in class listening to people around me talking about how "trashed" they got, and how hardcore the pills they took on the weekend were.
Are you seriously that bloody stupid?
Think about your health and dignity.