Are Americans, as a whole, emotional eaters? In a bear market, do we binge? Marketers sure are doing an excellent job of convincing us we should.

On the heels of Food Detective Lisa Donovan's look at the oversized ballpark grub trend comes news that Frito-Lay is pumping up the volume of snacks in its bags. It's true -- you're now getting 20 percent more Doritos and Cheetos, and it's not costing you (well, not dollars, at least). This reverses the company's previous practice of reducing the amount of food in each package.