I don't know what more to say, as I think this argument reached an impasse or rather several, several pages ago and if my posts have become silly or specious at times it's due to frustration if nothing else.
BUT it won't kill you, it's not harmful that diluted, especially with all the other junk in city air, it's a transient moment and it will be over very very quickly.
I'm not getting into another argument over perceived civil liberties, I've made my feelings quite clear on that we'll have to agree to disagree.
I do think that Nanarina's original post should have been treated far more censoriously, with a quick swift "none of your business".
I tend to agree with the need for sensible compromise on this issue, but I do want to correct one impression that may have been created by the discussion--that for non-smokers who catch a whiff of smoke outside, the discomfort passes"very, very quickly." If I catch a whiff outside, I likely get a migraine -- extreme pain and nausea that passes in 3-4 hours if I'm lucky, 24 hours if I'm not so lucky -- and in either case involves a lot of heavy duty medication that it's better not to take. I happen to be migraine prone and in much the minority and I do NOT think public policy should be dictated by my peculiar constitution. I also think smokers should be allowed to smoke outside, but it does bother me a bit when people assume that the "irritation" to non-smokers is just a few minutes unpleasantness. If we non-smokers are not always sufficiently conscious of becoming "moralistic" and "judgmental" etc., then I think it can fairly be added that smokers (and their advocates) sometimes are not always sufficiently conscious of the levels of discomfort involved for passers by.
As for Nanarina's original post--she was not commenting on something she saw the dancers do in private but something she saw on film, a film they knew was being made. I think it likely that as you (Simon) commented earlier, they did not give a second thought to lighting up, but anything one does in front of a film-documentary crew is something that may reasonably be commented on and reflected on by the public who sees the film (and from all different perspectives as this thread attests). Censoriousness about smoking is not the only kind of censoriousness that can get out of hand.