I would have slightly less disgust with the letter writer if he had addressed it to one of the hefty *male* anchors you see from time to time. However, oddly, he chose not to do that.
Even if one's weight is *entirely* one's choice, it is no one's responsibility or right to go around haranguing strangers. Without censure, this man, and others like him, will believe that he acted in a laudable manner.