I did not say that our teens need to be warned or to be given some sound advice. I said that our teens need to understand these things. In the context of their lives, their world, their problems, their challenges, their temptations, they need to understand. There are many reasons, but consider this. Too often we adults want our teens to be something that many of us adults never became.
Teens tend to be very idealistic.
Ethics, determining what is good and evil, is important to teens. It is quite true that their system for determining what is good or evil is commonly very different from our system. Teenagers hate hypocrisy. When it comes to knowing what is going on, teens are very savvy. The teen information network rivals any adult network ever developed.