I'd rather live in a country that provides comprehensive free health care and limits soda consumption, than one that allows me the "freedom" to consume as much sugar as possible and makes me pay for the consequences. I must be a radical hippie leftist: I think we should tax the sh-t out of refined sugar and subsidize organic vegetable farms.
Just the judicial and monitoring overhead alone makes this really silly. What do you do to a restaurant that serves unlimited sodas? What resources do you expend to find them and bring them to trial?