I think people's aversion to smoke/smoking has escalated out of proportion since all the hype surrounding the ban. People are just so much more aware of it now and I think can be even more selfish than smokers at times.
In an outdoor space I really don't think it is as bad as some are saying and like many other health warnings these days, I doubt the validity of the claims of those with something to gain from denormalising smokers.
Consideration on both sides would be good -
Smokers - don't let your smoke blow in the direction of someone in close proximity - check the wind direction before you light up!
Non smokers - Don't make such a fuss at the slightest whiff or merest hint of a fag at twenty paces!