Newer studies have reported that specific anti-oxidant cocktails (which most bb'ers likely get through MV/MM supplementation) can reduce the damage of smoking by about 70 percent. Of course, that's still 30 percent damage remaining.
I think if you decide to smoke, that you should migrate towards a "natural" cigarette (like Winston Lights) without the additives.
I smoked a pack-and-a-half a day for about 5 years up until '95; I then quit cold turkey for about 5 years; then I went through a bunch of shit and started sparking up again -- only at 1 to 2 cigarettes per day. Never in the house, never around my kids. If I smoked at work, I'd hide around the corner of the building so that nobody would see me and give me shit... Not because I was afraid of what they'd think of me, I just didn't want to deal with it...
To this day, I wonder how harmful 1 or 2 cigs a day is -- I would speculate not too bad, but have no clue.
I did stop cold turkey again, as I refuse to pass that on to my children (who have never seen me smoke). I don't want them to think it's normal or OK. It's a bad habit, but in moderation, it maybe is better than prozac...lol...
Although calming at times, I always did treat it as a non-social, only smoke when you are alone and not in a place where it will bother people habit. (because as a non-smoker, I'd learned how fucking repulsive that habit is to people that don't smoke)
Anyways, I'm all for no smoking in restruants, bars, etc... I loved it when I was in LA and nobody smoked...