I previously wrote an article on here about a concept that I call a Nickel-a-Meal campaign to overcome obesity. The idea is that we would all voluntarily contribute an extra nickel (with an option to opt out, of course) for every burger, "value" meal or even bag of groceries at participating outlets (visable by a common logo), and then have these hundreds of millions of dollars nationwide each year go to food empowerment projects where the public gets a stronger voice in the business of nutrition and health from our menu selections.
On http://www.AlterNet.org today a great discussion is going on based on an article written by John Feller about this issue. But notice that most commentators have a general cynicism that there isn't much we can do but sit around and wait for the lawyers to turn the drive-up windows into drive-through settlement payoff points (a la the tobacco industry).
I disagree and think there is ample youth and community infrastructure to make this kind of idea work without government or lawyerly influences.
Check it out and share an idea or frustration to some degree.
PS - You can see more about my idea at http://www.nickel-a-meal.info.