Oh FFS, it's smoke, not radioactive dust or something !
I think people need to get a grip and stop trying to start a storm in a teacup.
Smoking in the open air is not illegal, and it will never be as long as selling cigarettes is legal.
Smelling a little drift of smoke in the open air is no worse for you than smelling the smoke from a bonfire or from a bloody BBQ !
You get a lot more carcinogenic fumes from the cars and buses ffs, but I see you're not raving about making all petrol/ diesel etc modes of transport illegal are you ?
I'm all for making the world a healthier place for everyone (including switching to alternative methods of energy production and electric cars etc), but trying to erode peoples personal liberties is ridiculous.
What next ? Make alcohol illegal ? Make all sugary/ unhealthy food illegal ? Make eating meat illegal ? Make all clothing manufactured in third world countries illegal ? What about all goods relating to suffering/ death of animals eg leather shoes/ bags ?
Where would you draw the line exactly ?
An argument could be made for almost anything being 'unpleasant' or 'repulsive' to someone............................