Can we ban alcohol as well then? My father died a horrible undignified painful death due to alcohol related liver failure. I think the risks of alcohol are also well documented.
But someone drinking alcohol near me doesn't subject my body to the by products of their alcohol. You don't have a sense of smell then because I hate the smell of alcohol on someones breath. Ever seen a drunk vomiting in the street, not that unusual or even urinating in the street. I find that more offensive than smoke, I used to work in a town centre office and not at all unusual to arrive at work and find vomit on the pavement.
Thinking about it how about sugar? Dental problems, obesity yes sugar needs banning as well.
Someone eating chocolate next to me doesn't cause my body to fill with the byproducts of their sugar.
Someone being obese doesn't cause a magical obesity toxin to enter my body and affect my vital organs.
Ever sat next to someone obese on a plane? The squashing can make your vital organs uncomfortable.
I'll give you another example, my DH has allergies, quite serious allergies, and he'd like to ban perfume as it affects him quite badly. He is disabled and if you come near him wafting your perfume he may start to sneeze repeatedly which is extremely painful for him due to his condition and could cause further damage.
Do you ever use a car or other vehicle which uses petrol or diesel? Causes lots of pollution you know, has caused severe problems for asthmatics. So be absolutely honest now, have you ever used a vehicle when it wasn't absolutely necessary? Could you have walked to that shop, did you really need to go out and meet friends, do you really need a holiday, why not just stay home and avoid polluting the atmosphere.
You see there are all sorts of things that cause problems for people, for you it is smoke but you could easily be doing something that is dangerous for someone else.