I think this is a good idea. On one hand, people actually know at least a little bit about what they are eating and how it will affect their health. On the other hand, businesses won't really suffer that much because over half of the people who go to fast food restaurants regularly are fatasses who don't give a s*** about their weight.

If I'm 100% sure I can do it at the last second, then I normally do it at the last second. However, if I need to do something right away, I'll usually do it right away.

If I'm not mistaking, the percentage is about 99%, if not more. That's why strokes have such a major effect on a person despite them only affecting a small portion of the brain.