I would argue that there is difference between medicated and recreational (though some recreational might claim it is medical in nature for them). In my experience, there are some responsible smokers, and some not so responsible. As it is, I wouldn't shoot with the irresponsible smokers, even if they didn't smoke. It varies from person to person, but the fact is that there are some people I wouldn't like to shoot with period. That they smoke is almost a non-issue. A responsible shooter is a responsible shooter.