No matter how much you may want it, the world will never be smoke-free. You could ban tobacco completely, but you will only succeed in making criminals and terrorists rich and corrupting those responsible for enforcing the prohibition. Just like what happened during the 1920's with alcohol and like what is happening now with drugs.
Some people are not smart enough to realize it and never will be unfortunately. Cause and effect are lost on them. Might as well debate a post.
But the world is changing. Smoking was king in the fifties, now it is mostly relegated to the lower class.