Why do pop stars have to be seen as 'role models'?
One of the cornerstones of pop music, from Elvis and The Stones onwards, is that your pop heroes live out-there dangerous on-the-edge lives of the sort of excitement that would kill an ordinary mortal in about ten minutes!
If I wanted a pop 'role model', I'd listen to Donny Osmond or Pat Boone. I never have equated the way my pop heroes live their lives with the way I live mine - I don't imagine that being a heroin addict will give me an ounce of Amy W's talent, or make me a wannabe bad boy like that whey-faced loon who hangs out with Kate Moss.
Music is about talent, and artistry, and artists are exposed to the bad side of life - with varying degrees of effect.
If a child of mine was aping any of their bad habbits, I would look to my role in their life as a parent, not their pop idol's role, which they do not seek, or advocate.