It's about doing drugs.
The allure, the temptation, the effects...
One of the worst mistakes a person can make is by doing the aforementioned.
From what I have gathered (from certain sources I've come across the past few years) They know that it is killing them, they know that they have to stop, but to stop would be to lift of a warm blanket off them during the middle of a freezing cold night.
Its meant to be a deep insight into just what can happen.
I'm not trying to be a preacher or anything 'cause I believe that people should do what they want, try what they want and just have fun. Just don't let it carry you away until you can't see even yourself in the mirror anymore.
So yeah, that's what its about.
Hope I cleared it up for ya, Bini