On a tangent, I was watching a programme about supersize kids living in England and in one case a older teenage girl and her mom decided to get the intestine surgery (can't remember exact term) that drastically reduces their stomach capacity -> appetite so they'll slim down like crazy.
Basically they told the divorced husband/father about this a few weeks before the operation, and the girl cried when he said that she wouldn't need it if she had a change of lifestyle (ie not staying with the mom/house stuffed with junkfood/cake etc) and went to a fat camp.
Anyway they went ahead with the surgery and for the rest of their lives they'll be eating small servings of highly regulated gruel because they can't digest complex foods anymore. Effective, yes but I don't understand why she'd pick a lifetime of gruel over some effort while maintaining the ability to eat normal food.
In the programme, a boy cried when he was confronted over eating undercover while he was supposed to be on a diet to lose weight (he put on weight after his routine started and they snooped on him after school).