It wouldn't bother me, live and let live.
However if I were out with kids I might feel differently and wouldn't appretiate someone smoking something that is illegal close to kids.
I am a smoker (tobacco) myself and I respect other peoples right to avoid the effects of my bad habit.
However I get really annoyed when I am smoking in place where it is aloud and someone feels the need to give me a lecture on the subject. This happened the other week at a patio bar. After carfully listening to the bloke rant at me, I asked him what car he drove. The answer was a V8 truck. So I asked him if he would walk home so as to not inflict his poluting fumes on me as I walked home from the bar.
He shut up after this. The point is obvious, unless you cycle or walk everywhere you are hardly in a position to critise smokers (of tobacco) for smoking in a public, freely vented area.
tight lines,
cheers,
Paul.