Yes, a fair number of eating disordered girls use veganism/vegetarianism as a guise, an excuse to not eat certain high-calorie foods.
Yes, not all anorexics/bulimics get down to 60 pounds before they become extremely ill. Some are indeed pudgy.
No, promoting a veggie/vegan diet is not the same as promoting eating disorders.
No, the girl's hair doesn't appear to be falling out. Her roots are lighter, she probably dyed her hair.
HOW DO YOU HAVE ANY WAY OF KNOWING WHETHER THIS GIRL IS EATING DISORDERED OR NOT? The fact is - you don't. And assumptions are rather ridiculous, esp. because the pallor of her skin is not that of someone who has been suffering with a major eating disorder, nor is her hair weak and limp like most hair gets after it is being denied nutrients. Do a little more research or have a little more experience with the shit you're talking about before you start trying to preach, please.