I have stated my case about 'role models' previously - so I will move on to the other aspects of the Question.
From my experience of the music indsutry, which is considerable, fans buy records because they like the soungs and the artist, they do not gravitate toward an artist because of a publicised habit.
The media always has got its knickers in a twist about musicians' bad habits, but frankly, it matters little to the artist, or the fans, who would certainly not boycotrt their favourite artist's work on the basis of their personal beliefs.
Look at Pete Docherty - never out of the tabloids, or the courts, but his records with Babyshambles sell abysmally. Why? because he is a seriously famous drug addict who makes lousy records - that illustrates my point. If record sales equated with press acreage, Doherty's album sales would dwarf Michael Jackson's stats several times over.
If an artist makes good music, they will be forgiven their personal choices - look at Wagner, an acknowledged fascist, it doesn;t stop his music being enjoyed worldwide - apart from Israel that is.
People do not make choices for their music based on addictions. As for 'awards' - do they really matter to anyone anyway?