In the old days, airlines allowed smoking inside the airplane.
Unfortunately, in a crowded space like an airplane, this means involuntary smoking by others near the smoker. Since the smoking section was larger than the typical number of smokers, some non-smokers were forced to become involuntary smokers because the only seats available were in the smoking section.
The smoke didn't know whether it was in the smoking section or not. Everyone in the plane breathed unhealthy levels of it. The miniature packs of cigarettes they used to give away were pretty cool though.
