Since this thread is dealing mostly with young people and raves, I might take the opportunity to investigate this issue of mine a bit further.
Haste, thanks for your comments, it helps a lot to know that someone else would have made the same decision in a similar situation. Truth is, this 15 year old is the younger sister of a close friend of mine, and fortunately nothing further has been mentioned of the matter. However, she's not going to be older for some time now, and I have no doubt that the question will be raised again in the near future. I had previously decided to provide information to her initially, and arm her with enough information (and check to make sure that she understood it) before having a good talk with her.
At the same time, I came across another dilemma. Now, supposing I gave her the information, and educated her as much as I could, given her receptiveness to both my information and concerns... if she decided that she wanted to drop,
would I be willing to make sure that she got a good pill, or
would I wash my hands of the matter having piously decided that I had 'done my duty', or
would I try SupaspeeD's method (albeit a placebo version, plus probably a generous amount of the 'acceptable vice' - alcohol) in the hope that she would decide it wasn't worth the effort?
Now hopefully, if (and when) the question does come about, she will make the most sensible decision for herself at the time. I know that with or without my aid, whatever she decides to do - she will do, so I might as well make sure that her decision is based on as much fact as I can provide her with. But will my perspective on the issue bias her decision? I guess there is the loathed "media favourite" option, of selectively presenting the facts to her, in order to try and make her choose the direction I would prefer... but again, I guess the decision will ultimately be hers.
BigTrancer