They are not health Nazis, Michael. What are often referred to as "smoker's rights" are often the "rights" to spit carcogenic fumes into other people's faces, noses and mouths. I have had a chronic sinus problem for years, and being forced to smoke can cause me coughing and headaches. If I go to a pub, I accept that as part of the deal. On the other hand, if I am using public transport, I resent having to inhale. Smoking has absolutely nothing to commend it from a health - or financial point of view. It is a heavily advertised form of drug addiction which makes huge profits for well protected and ruthless companies. My problem is not with people's choice to smoke - you should be free to pick your own drugs whatever other people's opinions are. The problem is that people who wish to be non smokers are often forced to smoke passively. The pendulum has swung against that assumption - and it's alright by me.
Getting back to Naemason's question, I believe that France and Italy have both introduced laws which introduce smoke free zones and nowadays public transport in Germany is mainly smoke free.