I guess the problem that I have with some of these arguments coming from smokers is that they have this attitude that non-smokers are being unreasonable and mean just because they don't wish to partake of the byproducts of their habit. They almost have the attitude that those who consider smoking offensive and unhealthy are some sort of space alien nutcases. It only takes common sense to know that any kind of smoke, whether it be from cigarettes, chimneys, fires, etc, was not meant to be inhaled into the lungs. If it were meant to be inhaled, then why do the lungs try to reject it when it is first introduced into the body?
I just wish that smokers could be honest and just say what they are really thinking, which is probably....."I know that my smoke is harmful and offensive to others but I don't care". That would be better than the laughable argument that there is nothing wrong with it and that the years and years of medical evidence are complete bunk. I hear that a lot from some smokers and I guess perhaps it is simply denial. Kind of sad actually.
I think that deep down in the smoker's mind, he knows but his thought is that he is taking the risk of dying of Cancer or COPD and how dare you complain when you are just getting a fraction of the risk he is taking.
Like taking a risk with one's life entitles one to put others out.