Then mandate smokers to smoke in a way that doesn't affect other people. There's plenty of things that can be done so that non-smokers don't have to breath in smoke and smokers can retain autonomy over their bodies. But it's not realy about that, is it? In a world where you pass hundreds smoke spewing machines every time you walk down the street, and every city requires a huge smoke making facility running 24/7 that can turn the whole sky gray if the wind blows the wrong way, cigarette smoke is the least of your worries. What it realy is about is control over other people, taking away their choice and forcing them to conform to your way of life.