Alissa is perfect, not skinny. Just because the population are full of over-weighted doesn't mean that the skaters should be heavier. I think most of them are just fine. Unless some skaters really have the disease, control eating is necessary. Control eating is necessary for anyone for their own health.
Czisny is too thin - and I think she's not getting enough Vitamin C and D in her diet to strengthen her bones, which could lead to more injuries. Don't know of too many "fat" skaters.