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.
What about the countless friends I've smoked in close proximity to that are non-smokers and do not contract bronchitis? What about me and my smoker friends who inhale this stuff every day and don't have bronchitis? Your statement is ridiculous, unrealistic and unfounded.
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.
Your blanket statement about those who frequent bars aside, not caring/expecting something that would cause, in your example, bronchitis would not prevent it. I know I will suffer from sinuses every fall, yet it still happens. Yes, even when I don't smoke this happens. It wasn't an anology, by the way, it is an observation that will reproduce the same results if you yourself would go and check. You will see a healthy person walk past smokers and enter a bar, then leave the bar without bronchitis - or any health problems you'd attribute to smoking; they could be drunk, though.
Or straw man laws?

Your point was that since we smokers are irresponsible there are laws to prevent smoking in places. On the road, we have laws to prevent people from going through stop signs, red lights, etc. Why do we have these road laws? Because drivers are, for the safety of everyone, going to be assumed as irresponsible. They're one in the same.
Smoke from a cigarette that you walk through on your way to somewhere will not cause any long lasting or serious health complications. If you don't believe me, please take a step outside and watch for yourself. Have a friend walk by a smoker and see what happens. This debate was never about smoking inside, only outside, mind you all. I've a feeling this was forgotten in between the bickering, and has possibly (hopefully) led to some confusion. Your arguments have become weaker, condescending and you have personally insulted me a couple times, so I'm going to stop beating this dead horse.