It's not a good time to ask this question of me as recently I have had some bad experiences of smokers.
At lunch I tend to go find somewhere to sit and eat, usually a bench, unfortunately I have experienced a number of smokers plonk themselves down at the side of me and strike up, not a single question as to whether I would mind or not.
Then there is the dropping of the fag end, I must be tuned into it now as I seem to see it far too regularly.
As far as a ban goes I think it should extend to cars, parks and other open spaces which may be occupied by both smokers and non smokers. Contrary to what most people seem to think, the smoke plume extends quite some distance from the smoker. When I walk to work I have on occasion detected remnant smoke from someone who has long gone, it's hangs around.
The government should announce that in 5 years smoking will be completely banned and so will the sale of cigarette's, better for peoples health, wealth and the environment.
Incidentally Saint, I have seen two pipe smokers in the last week! One of them being a young student type with skinny trousers and a ridiculously big bears.