Bob F wrote:
If you were really cured cigarette smoke wouldn't bother you any more
than barbeque smoke or stinky perfume.

There are large numbers of people that have significant negative
reactions to cigarette smoke, most of whom have never smoked. Most
smokers refuse to recognise just how offensive their exhaust is.

Then the negative-reaction folks own the problem, not the smoker. Any
attempt to force person "A's" solution on person "B" should be met with
overwhelming, instant, and deadly force.

When people tell me I shouldn't be smoking here, my rejoinder is: "It's
alright. I'm French."