If I remember correctly, there were only two instances in my life where I told someone "If you do that again, I'll punch you!"....both times were when they intentionally blew smoke in my face. Since I was known as a pretty calm, mild-mannered guy, it got their attention.

That has been over 35 years ago.....although I have had, a few times, to do as Ebbie did and warn someone about the rules, or that their smoke was blowing MY way.

At one time, I simply avoided places where there was much smoking going on, but once the evidence about the dangers was clear and we heard how tobacco companies had hidden the real data, I became MUCH more militant about MY rights.
   These days is is a very rare instance when I even have to smell a cigarette.