Well I used to be a little chubby when I was a kid; I was never much for sports, not very athletic at all... and well yeah, my parents definitely did not think too much about what we/I ate (and they still don't - whenever I come home these days and see the way my mom cooks I just think to myself: "OMFG" - tons of fried stuff, everything basically cooked in/with butter, a lot of carbos, and little to no veggies, and of course the occasional (or regular) fast food dish). So one thing led to another, and everything together to a pretty low level of self-confidence lol.
Thankfully I kind of outgrew that a bit during adolescence, however the un-athleticism always remained, so even though I was not exactly "chubby" anymore, but still not really fit.
I guess I started going to the gym after I had started university... in my first year or so (without any regular physical exercises like I used to have at school), I actually put on almost 20 pounds again (which was not all bad, since I was ok for my height I guess), and thought - "Well, I really should do something or this will keep up and I'll not look "ok" anymore but just grow fat". So that's why I started going more or less regularly; I still take breaks from my routine a little too often, but sometimes I just don't have the necessary time for a month or two if there's a load of work to do at university; but I try to go as regularly as I can. Meanwhile I'm maintaining 160lbs at a height of 5'9'' right now, which is pretty ok... A bit more "solid" than I used to be, though still no sixpack lol (though I'll never have one, I just still eat too much junk food for that). In any case, I personally just feel better when I find time to do some regular working out... a lot more energy, plus you build up more self-confidence if you find your looks more attractive I guess.
So I really don't understand people who complain about their weight, but really don't do anything against it - and I personally think, a diet alone is only half useful; if you do some sports along with it, then you can achieve some results... But dieting alone will just ruin your mood since you basically never can eat what you want. If on the other hand you practice some sports together alongside, you can eat a lot of more stuff and still maintain your weight since your body just needs that much more energy, it's really simple.
I believe especially in America (but of course in every developed country as well), obesity is becoming a huge problem... but as many of you have pointed out, other than when obesity is truly induced by health problems, I really don't think overweight people should play themselves up that much. If they have all those problems they need to complain about, then THEY should do something about it, and not EVERYONE ELSE. Why should any city/state/enterprise use money to accomodate the needs of massively overweight people, when those people themselves would do a good thing both for themselves and their health, if they just got their asses in gear and actually DID something about it, instead of only complaining all the time.
It's really not that hard; but it is truly difficult to feel compassion for someone who is just plain out too lazy to do anything, and resorts to complaining in order to gain some (sort of) positive response from the public, instead of only stupid jokes and comments. Of course, there are always those few who can't do anything about it, who really do have a disease. Those of course are exempt. But for all the others, who just prefer to stuff themselves with junk food all day and never even consider going to the gym or working out for a few hours every week, I really have no love left too. May seem a bit hard, but at the end of the day, everyone is responsible for themselves. So don't blame it on the others if you can't take care of yourself, just because you are too lazy.