I'm not really a "foodie" per se. I try to eat organic, I'm going into my second year with a Community Sustained Agricuture share (CSA), I work at a writing desk older than I am, I buy almost all my clothes gently used or discounted. Although I drive a mini-van, I only put 8000 miles on it per year. I believe in sustainable farming, buying locally, reducing, reusing, recycling. While I'm not a vegetarian I think animals slated for food should be treated and slaughtered humanely. When I have red meat it tends to be from grass fed, organic beef. I will tell you right now, it's expensive. And while my CSA is cheap in the long run, it is expensive upfront. There would be no way I could eat the way I do now if I was poor. The reason why I choose to eat organic is this: I kind of like my food without poison or antibiotics and I think organic food tastes better. I don't know how much organic aids in health since Americans have been living longer despite "gorging on junk food." Being a foodie also helps me learn to enjoy food again instead of feeling ashamed when I eat.
You think I would get more involved in the movement, but I can't. Because I feel ostracized due to my weight. Many movements that encourage sustainability use ending fatness as a reason. Fat people are put into two different groups: On the one hand we're villains, where groups like PETA use images and messages that it's fat people's fault because they don't eat vegetarian (I actually know a couple of fat vegetarians and some rail thin meat eaters.) They also pick on children. On the other hand the more dangerous aspect is being labeled as a victim. The poor fat people don't know how to eat right, and are too stupid to realize that if they just changed to organic they would be thin and happy. Victimization makes fat people less than human. We become unable to make our own decision and have to be told what to do. At least with being labeled a villain, people are honest.
Where does that leave me and the food movement? Still on the outside looking in, however not all seem to think "organic = thin!". Linda Bacon, Liz Snyder, and Jill Richardson are all pro-foodies and pro-fatties. There was also a blog post from 2 years ago on Feministe complaining about the get rid of fat with good food meme.
If you want people to begin changing to sustainability, you need to not alienate them. The movement isn't all for people with a BMI under 25.
And to go completely off topic, if you're in the NYC metro area and you want a fat dose of high self-esteem, awesome bargains on clothes, please get to the Fat Girl Flea Market!