@mynameisbrian
I do not mean to derail the thread, but although you acknowledge Anorexia Nervosa and Bulemia as 'eating disorders'. you've very conveniently disregarded Binge Eating Disorder and Compulsive Overeating, both of which are recognized eating disorders !
That's one of the reasons I cannot condone the whole ''fat people are just greedy'' argument ! 
It's all just too convenient to stick a negative label on a characteristic, and then verbally attack other people who question it !
So, in your opinion,
Fat = Greedy
Underweight = Eating disorder
Do any of you honestly believe that any obese adult in their right mind chooses to be obese/overweight ?
Chooses to be the butt of jokes ?
Chooses to be unable to buy clothes that fit ?
Chooses to be out of breath climbing stairs ?
Chooses to be 'judged' by EVERY thin person they know?
The fact is, NO-ONE wants to be fat ffs !!
But the complexities behind how someone has become overweight are complex ! It's NOT just because they WANT to be fat FFS !
I think it's horrific how people feel fine and dandy about being incredibly and horrifically rude, insensitive and hurtful, to a huge proportion of people, just because they've 'done better' (in their own minds) at 'being thin' 
It's taking things back to the bloody playground mentality of saying, ''I'm cool, so I'll make FUN of the fat kid, cos he's just GREEDY'' 
Aren't we adults ? 
Aren't we capable of thinking ''there must be a reason behind the choices someone else is making ? 
Aren't we capable of empathy or compassion at the very least ?