TheMotivator has proposed a sweet-style 60's-type protest to fuel prices. If only these things had a prayer of a chance to motivate the oil companies/countries/cartel/...
It might have some effect on obesity.
If we could keep a similar protest going for 90 days non-stop 7 days a week, we might at least get sombody's attention for a while. The net effect on demand, however, would be miniscule, and those who perhaps could (do something?) would simply smile that cute smile (like *** Cheney) to their cohorts seated next to them at the lunch table.
A better solution: Lose the Hummer/SUV/Pickup.