I've been using Sparkpeople, which is pretty adamant about "You will not restrict beyond a certain range," and there are still some folks on the message boards who make me wince and think "Honey, you have an eating disorder. You need a doctor, not a fitness site."
I wonder if Fitocracy's competitive model encourages that?
Sparkpeople annoys me for other reasons--like its relentless perkiness--but I switched to it from Fitday largely because it has a better food database and integrates mileage tracking and water and so forth.
So I just stay away from the message boards. Because I need to take care of myself and be strong and healthy, not calorie restricting beyond all reason.
I too think people have every right to determine the body size that is right for them, and where they feel healthiest--the goal for me is not fitting into a size 8, or whatever, it's making sure my blood pressure and cholesterol are healthy.