I completely agree, but judging people for bragging about under eating by bragging about over eating, it's just doing the same thing backwards.The women on Mumsnet are judgemental and competetive with it though. Nobody would give a duck if they weren't going, "Oh, I couldn't possibly eat 1200 calories a day!" implying that others have no self restraint, when that's literally what you'd feed a toddler. I'm not saying people who don't eat because they're not hungry are joyless.
The whole world is judgemental of large people. People can like what they like, but I think competitive self-deprivation and one-upmanship when life is so short is the very definition of joyless.
Thin people are judged too. Women are judged for their bodies no matter what shape. I think we need to stop talking about what we eat and how we look as if it's a competition. It shouldn't even be a taking point.