People can live however they want (with regard to food). There would have to be a country-wide change of attitude toward body image & nutrition.
I mean... I even know people for whom their weight serves as a "fuck you" to society for trying to "brainwash" people into thinking only thin is beautiful. And I have a friend that looks as if he swallowed a fully inflated beach-ball, but doesnt think he's *that* fat because he knows a couple of guys who are fatter. This is the same guy who's constantly harping on me for my size at 5'2" 115 lbs. Hell, my own sister is about 200 lbs overweight. By choice. Its insane.
Our teenagers are getting heavier and heavier. I think about 25% now are overweight. And according to this:
http://www.mamashealth.com/anorexia.asp website, about 1% of teenage girls are anorexic. You do the math.
The US is a fast-food, wal-mart, tv watching country. Fats the new skinny. At least thats how it seems to me.