The largest issue with losing weight once someone becomes an adult is the mental aspect of it. I would wager that most obese and morbid-obese were well on their way to their lifestyle at 10 years old or earlier. It's really cool to post pictures and make fat jokes, because we all know it's the last OK form of discrimination, but no, it's not as easy as some of you have said. It's simple, a child cannot dictate what he/she eats, obviously. They eat what the parent(s) provide and before you know it that child is an adult and now yes, they can earn their own money, but they are way down the line. Not to mention it impedes them from getting some jobs, therefore they may have to take a lower paying job that doesn't entitle them to organic foods and gym memberships. They are pretty much just long gone at this point and all they see is Mr. Everest in front of them waiting to be climbed. Combined with the fact that some people began over-eating as a child as a coping device for problems in the home or elsewhere. This is a terrible bad habit and one that is hard to kick.
All those things are psychological issues but yet no one really sees them as that, therefore no sympathy is given. Everyone hates the fat people, but usually no positive encouragement is ever given. I don't know why they get so much hate, if it wasn't for them then the beautiful people wouldn't realize they are such. And lets be honest, a good chunk of the people that constantly hate on fat people were just blessed with good genes and/or a fast metabolism.