Just a little humorous story. One time I was taking the train over to RNO from CHI, and I was standing far away from everyone on the platform in DEN having a smoke. A man and wife walked by me, and she said to me "They need to ban smoking everywhere because all of you smokers are polluting the air! We have a right to breathe you know!" I looked at her and politely said "Mam, I understand where you are coming from, but, I gave up my car years ago because I wanted to take public transit to help cut down all of the pollution in the air. Now, do you think I should have the right to tell people that they cant drive down MY street because the car exhaust is polluting the air and I have the right to not breathe their fumes? What do you think causes more pollution, cars, trucks, buses, even trains, or all of the cigarette smokers in the world"? She looked at me and said "You know, you have a VERY valid point!", smiled at me, and walked off with her husband. Now, I can see where smoking indoors can be a problem, but smoking outside, on platforms, away from the doors should not be a problem.