"Hoping to inspire women to put their clothes on" does not require being clothed. When little girls listen to Pink, watch her music videos or go to her concerts; they are inspired in different ways that a Miley or Gaga stan wouldn't understand
Of course eating disorders are no laughing matter but:
-Here are the
Bulimia Nervosa diagnosis criteria, obviously not everyone forcing themselves to puke is bulimic
-Drawing attention to an issue is not always mocking it. There is clearly a problem be it pathological or not and if she was critiqueing anything in Stupid Girls, it was the circumstances/social norms that bring girls to question their body image and beauty standards.