While I didn't quit my job to move away from my smoking coworkers, I must admit it has been nice not to have to deal with that aspect of work. The point being that you can't always move away from smokers.
Sorry if I cough when I have to walk by someone smoking. If I'm aware of it, I try to hold my breath and move around them quickly, or alter my path so as to avoid the unpleasant situation.
It is interesting that you suggest that the problem is wholly mine, and that smokers should be prevented from hearing or seeing the discomfort they cause others.