In other words, something we do not have, have not had for well over a century, and are not likely to see in the future. So you are basing your position about what should happen based upon a reality that is little more than wishful thinking. Doesn’t this seem a bit - fanciful - to posit as a basis for your argument?
For the sake of argument, let’s stipulate that second hand smoke can cause harm. Question becomes one of proportionality, obviously. You noted “a citizen’s sole remedy would be to make an armed response against this deadly physical aggression against themselves and their children.” Is it truly your position that, absent government coercion, a legitimate response to catching a whiff of smoke on a public street is murder? Of course not - because of proportionality. Let’s bear that in mind as we go - hyperbole doesn’t serve the purposes of debate well.
Let me explain this to you more simply then. I maintain that, absent State usurpation of what are more properly civil society preprogatives (e.g. providing for the poor), then innumerable civil society mechanisms come into being to address various issue - spontaneous order. For example, the innumerable mutual aid societies of the 19th century, at which time one in 3 adult males in the US were involved in these societies. But when the State usurps such functions, the civil society mechanisms disappear, because the State has thus ‘taken over’ and forced out the private, civil society organizations. So, my position was that, in a system which is NOT dependent on the State, where the State does NOT usurp the functions of civil society, we could expect to see more effective and efficient resolution of social issues like second hand smoke. But you then tried to apply this to our CURRENT system - the system in which those private initiatives do not exist because the State has arrogated to itself all protective functions. So you took the assertion I made, took it out of context, used it improperly, and then tried to claim this was proof that my proposal was unworkable. But the only thing unworkable in that process was your logic.