I should probably avoid debate with you since you clearly have a sour disposition toward smokers, but hell, I should at least make my case.
Toward the immature ones. It's obvious who they are.
That is not the "common reaction". I've never had someone walk by me smoking and contract bronchitis.
Since they don't contract it in front of your face, I doubt you followed them to their house or the doctor's to find out.
It's quite obvious that walking by someone who's smoking outside will not affect the most people's health in any significant, permanent, or noticeable way. That's just the way it is. If you don't believe me, go to a bar and watch people walk by a person smoking outside.
People walking into a bar generally don't care about smoke, either smoke themselves, or expect it. Horrible anology to any public building, but you conveniently ignore at the very most insignificant some do have allergy-like reactions to it which are instantaneous, it's called coughing, I doubt your concern is what it does to their lungs, therefore it's not my concern who blows an air horn into your ear. A healthy person can take it. That's just the way it is. If you don't like this combative logic, perhaps consideration of others and their health will take you much further. You aptly show why we unfortunately have smoking laws. Hand needs to be held.
As for the law bit, well I guess we're all children for having driving laws, employment laws, or any laws at all.
Or straw man laws?

Are you as adamant against vehicle exhaust as well, 3rd eye, or just smokers? I'm asking because one of my [censored] psychotic hatreds (I don't have 'pet peevs') are non-smokers who are as vocal as you are, but then drive a Hummer. It's not for nothing that they say you're better off smoking a pack a day than bicycling in New York / London cross town traffic.
Get my drift?
While I agree with the 2nd smoke argument I feel it's one sided.So many things in our society are extremely harmful yo our health, but the smoker seems to be singled out as the anti-christ of it all.
I've heard the argument concerning vehicles countless times and while I dislike how polluting vehicles are they do serve people a common, positive purpose, which is transportation. Sometimes good or extremely useful things do have a by-product or a downside -- now here's the awesome part.. what's the useful or necessary thing about person A breathing all the [censored] in cigarette smoke from person B, pray tell, that necessitates the comparison to a vehicle? Translation: How are cigarettes as useful to another person as a vehicle is or can be? Really it should be blatantly rhetorical.
Unfortunately smokers are everywhere, not just New York, people smoke in their house in front of children, before laws were made to curb this, people smoked in buildings in front of children, in a car with children (contrary to popular belief opening the window doesn't expel the smoke so the child breathes in none of it or some insignificant amount, they are in fact breathing quite a bit of it), didn't give a rats ass or gave the middle finger when asked to put it out with consideration of others' health so it's not the same thing as avoiding going to New York to reduce the amount of air pollution that goes into my lungs. The disrespect for others health due to that
one person's own addiction, which serves absolutely no physical benefit to another, is to the contrary unhealthy for them to breathe, has necessitated smoking laws due to the inability of the smokers to care about the health of others. Note that this is not about
all smokers before someone comes charging in armed with a straw man sword, there are some good smokers who keep smoke away from others, kindly walk outside, away from entrance ways, where they know they're subjecting others to any decent concentration of it. Those people I respect, and those people unfortunately in some cases suffer to do their disrespectful smoking counterparts' lack of due diligence.