Soda is bad sure, but telling people that they cannot have it is a very fine line for me. I don't agree with that at all. I don't even agree that drugs are banned either. If you want people to not drink soda then educate them on how many calories are in a 20 oz and how much sugar they are drinking and what the affects are of doing so, but taking away their freedom is just really stupid imo. I drink diet soda, and know it is bad for me, but I am not consuming sugar (just cancer) and I would be affected by this ban also because they probably lumped it in with regular soda when it actually isn't filled with sugar.
Stopping soda will not cure obesity, educating people from a young age, providing healthy meals (that taste good) at schools will help far more then banning somebodies right to have soda.