This is a bit ridiculous to say the least. Causing a problem for others by smoking is clearly antisocial, but not necessarily malicious. People do things all the time which are harmful to themselves or others (bad diets, lack of exercise, burning fossil fuels), but the effects of these aren't generally immediate and so aren't at the forefront of most peoples' minds, even though they should be.
Forefront of people's noses more like. But less facetiously, those examples aren't just less immediate but are also subject to cost and practicality, at least for some. Bad diet; if you mean burgers, crisps, take aways for every meal, then yes, you are right.
If you mean microwaved meals on the hoof because you have a strict 30 minute lunch break at work - that's different. Similarly ready/processed meals in general. As little as 20 years ago, probably every town and village had proper greengrocers and butchers. Nowadays, the best you can hope for is a limited range of fresh meat, veg and fruit at the "local" Supermarket.
Exercise yes, you could do a limited amount of exercise within the home, but for many there are no parks within walking distance and if there are, you have to encounter the "elements" to reach them and use them. Again, at work, most jobs are sedentary nowadays, and workloads means it just too easy to sit at your desk for 4+ hours at a time and forget to take recommended breaks.
Fossil fuels - does the individual really have a choice as to the source of their domestic heating?