I suppose smoking is stupid, Avg-Joe. My kidlet did so for a few years and then quit, much to my delight. (I always assumed if she had not grown up with a mom who smoked, she never would have.) This is not an activity I would encourage anyone to take up.
But I have to balance the distress of quitting against the risks of smoking, and so far -- for me -- smoking wins. Having said that, I again will state I have no argument with those who want to charge me more for the habit via health insurance. I'm not even opposed to uprating people for other risky behaviors (I wouldn't include dog ownership....seems to me, the companionship and the exercise make dog ownership beneficial) but I grow uncomfy with this past a certain point. After all, insurance is about spreading risk, not punishing risk-takers.
Depriving renters of a place to live, ruling that smokers cannot have custody of their children, forcing owners out of their condos, barring people from smoking out of doors, refusing to hire people who smoke or firing the employees who refuse to quit.......these steps I think go too far. After all, smoking is legal.