I should like to think that reasoning with them alone would be sufficient. Rather, it is what I would hope. However, I concede that this doesn't seem like a viable solution.

[ For varying reasons. These teens are definitely not going to want to let go of the power that they have here. Not without a fight. Juveniles are terribly short-sighted like that. They think of the immediate instead of the long-term. Most are thinking about themselves rather than others or even the community at large.

So of course logic and reason aren't really going to appeal. Not in words. ]

Thus I believe an alternative method is to make it more effort than what it's worth. Force an evaluation of risks and rewards by continuing as they have.