You support the idea of the greater good, as long as it doesn't affect you personally. If it does, then you'll be crying and raging with the best of them. I say this to you (without knowing you at all) because that's human nature. It's a very rare person who sacrifices themselves for the greater good, and the odds tell me that it is not you (or me).

But you're happy to sacrifice someone else for the greater good. Got it. Just please don't revel in someone else's potential suffering so readily, it's uncomfortable to watch.

Prohibition of fast food won't work because prohibition never works. Education and support is the right way to go.