My Weight Does Not Define Me

Is 'fat' really the worst thing a human being can be? Is 'fat' worse than 'vindictive', 'jealous', 'shallow', 'vain', 'boring' or 'cruel'? -JK Rowling
There is a post on Facebook with that going around. I think it's a fantastic quote and shared it. As is wont to happen when someone brings up weight, one of my naturally skinny friends responded, saying fat is like the flu and we should seek to be rid of it, "in [our] own interest." I'm not quite sure why, but that response really pissed me off....