By and large, they probably are, but there is a sizable minority that insists on ignoring smoking rules (set by the property/building owner), tossing butts on the ground, and going into close public places (such as meetings) smelling like an ashtray. Unfortunately, it is difficult to crack down on only this group, so all smokers tend to feel the consequenses when harsher rules are made.
I do find this to be a bit over-stated. While smoke DOES tend to pentrate and remain in clothing, even after laundering, the idea that this somehow entitles LAWS and SCORN to be applied ONLY to a certain class of people is to be total over-kill, for the sake of inconvienience/tastes of others.
As far as meetings go, I have tolerated the smells of various non-smokers and tolerated the disgusting (to me) stuff that some health-nuts and enviro/health/fitness whacko's insist on eating/drinking, and while I find it OFFENSIVE TO ME, I have yet to see masses of them attacked by smokers/others for their tastes.
One man's junk is another man's treasure. Let them be, and be a bit more tolerant, can you?