Assholes will always ruin things for everyone else, on that note I don't think they'll put any kind of a ban on caffeine. I'm sure Coke and Pepsi own enough congressmen to make sure that never happens.
It`s natural in coke and pepsi, same with coffee, they`d love to see artificial shit get banned means more for them.
However if ever there was a drug that gets accepted it`s caffiene, we as a cultural are addicted to it. It is my strong belief, poor people would be alot less stupid, if they simply had more caffiene in them.