The end of your first paragraph is very telling Laskawy.  If she wants to influence the American diet, she needs shed some of her priviledged life style and try living for a while the way lower income and  middle class working people do. 

The American food delima is much to complicated and entrenched to be solved by easy answers such as planting a garden in your yard or window box.  The causes are many.  Desire for convenience, desire for two income families, the decline of the nuclear family model, on and on and on.

Now as much as in the past, eating is as much about social issues as it is about nutrition.  75 years ago, moms fixed dinner, dad in from farming or home from work and families ate dinner togehter. The WWII came along and things started changing.  Moms started moving into the world of work so they needed convience foods.  Dads started putting in more hours and kids started round the clock activities, so meals are eaten in shifts, often at places other than home.  All those changes brought about changes in what we eat.

Now, food activists want to place the blame on "Big Agribusiness" and "Factory Farms."  Well, that just aint how it happened.  Americans food consumption habits weren't changed much by what was available.  Americans consumption habits changed what was demanded and the food processors and farmers met that demand.

If Mrs. Obama and her foodie friends want to change what Americans eat, they are going to have to make much deeper societal changes to be effective.

Foodie's aren't the enemy here.  Bad agricultural management practices have created behemoths like Archer Foods who don't care about good food but good profits.

The organic and local food movement, driven, nay "demanded," by consumers, just makes more sense from a sustainability perspective and profit perspective.