I understand the health costs of sugary drinks, but personally I want to live in a world where I can have one if and when I want to. I don't drink a lot of soda (maybe one a week), but there are certain situations where I find them really enjoyable. I don't want them to disappear.
I think the quality of life will go down if we get rid of all junk food in the world. I know we do a poor job of eating and drinking in moderation, but I don't think the solution is to just have it not be available.