I don't think their smoking caused problem but will most definately agree with you it sure isn't helping them and can't think of a more irresponsible action than subjecting ones children in their condition to smoke.
Being a smoker, who hates being one myself, I also agree with you I am not to bright on that issue. You would think with all the risks that can kill us we have no control over I should be smart enough to avoid those I do. Not so--YET--but still trying
