I once read that heroin addiction is easier to kick than nicotine addiction.
Addiction rewires the brain. A heroin addict of a couple years may not be as rewired as a nicotine addict of a couple of decades. That said addict yourself to whatever you want, it ain't may place to tell you what to do, but I do think folks should inform each other of the consequences.
And that said, you old guys stop hogging all the health care!!! There ain't going to be enough to round soon. Who in their right mind would want to be a doctor and have their life run by scumbag politicians, regulations, and law suits, in an ever decreasing pay with ever increasing financial debt do to bull crap.