Got me there Tiger, though I did say I never
heard of such an incident, not that such an incident never. I'm man enough to admit that I don't
quite know everything
Still, given the rarity of such occurrences I think the safety people have bigger fish to fry.
You can't see stale air, you could see cigarette smoke making its removal a necessity.
You've hit the nail on the head there- the smoking ban was all about optics. No different from the passenger screening that goes on in airports- it does nothing for our well-being but makes everybody believe that something is being done.