It comes down to this. Be thankful you're smart, healthy, and well informed enough to live the life you live. You most likely got your superior (i mean it) foundation for free. Maybe it was your folks, maybe you're just naturally well intentioned, but none the less be thankful for it. Help those that aren't so well off because beneath all that "failure" of a person you see is a foundation built on years of pain and suffering that most can't relate to.
You might say, i've seen it and fat people just get fatter, are self destructive, lazy and go back to the hospital again and again and… I used to feel that way until I decided to take pause and get to know a a few of the patients i saw repeatedly on the in-patient side of things. After a while I was just like "okay whats the deal? you're killing yourself. I don't get it."
I started to learn that the obese are no different than I am, I am just stronger. I have a better up-bringing. I have more opportunity. I am busier with my job. I have different friends. I can afford things. I also saw very clearly that the worse off we get as a society the more we will become fat poor and unhealthy. Obvious? Yes. But what I felt very deeply is that should the condition continue long enough, even you and I could be sucked into the vortex. it's not choice. It's the society destroying the bottom of the bell curve. As more gets destroyed, the closer it gets to you and I.
If you want to just be quiet about it, fine. We all can't care about all things. If you want to do something about it, please do. But if you show your discontent by just complaining on a yuppie website, well - in the politest terms ;-) - go get fucked. Because thats just useless.
Where do we stop classifying things as disease? I don't know. Thats a different more philosophical debate. But obiesity is very clearly a disease which needs to be treated as smoking is treated now. It's just more complex. But this is a step in the right direction.