Not just smoking, doing drugs. He ain't just smoking cigarettes, that would be okay but he's smoking marijuana, not okay. It's illegal for a reason.
That's actually a misconception. Marijuana is actually healthier for you than alchohol. Of course smoking it isn't exactly the healthiest option but my point is that drinking is a lot worse than smoking it.
This is coming from someone who gets majorly pissed when I go out clubbing and only smoke weed like once a year lol.
-Sean