Anorexia and Obesity are certainly two different illnesses, but somewhat related. While you will hardly find websites that are Pro-Obesity, there are Pro-Anorexia websites out there. Forums where girls give each other tips and support to starve themselves even more. These girls have such distorted self images that they push each other even further down the drain. This is terrible. 

More? Video of a girl discussion her Anorexia, [Part II] and [Part III].