why would you incourage this behaviour?
to me this sounds like someone with a serious eating disorder.. its not healthy to fast then binge on chocolate and pizza?
its not even healthy top be fasting and binging on healthy food (you could do some serious damage on your digestive track!!!!) let alone eating something like chocolate and pizza.. and for you to encourage her and ask her what fast shes on that she can do this isnt any better..
besides i dont know how tall this girl is, but saying oh I want to be 100 oh wait 110 and not even going back to change her typo shows that she has a problem. unless shes just trying to get a rise out of people...