I think if any of them did (except for maybe Doc) then the media would get in on it, and I bet KG (omg can't imagine him smoking cigs everyday ugh) would latch onto whomever.
Personally, I can't stand to be in the presence of any secondary smoke, and I stay away from anybody who smokes, for my own good. The fact that people can be so dumb to get hooked onto these things, and stay on show they have no drive to avoid 60+ carcinogens in a cigarette.
Ah, I can keep ranting about these [dang] cigarettes, the #1 problem in my state where I live. They've had city bans in public places already.