I remember that study from social psych class. It really struck me that the participants had such serious adverse effects from a relatively low level of calorie deprivation compared to what many people who are dieting subject themselves to. This particular article still begs the question of why there has been such a huge increase in obesity over the past few decades, but I strongly suspect there's an environmental explanation. (I've seen studies suggesting a link with sleep problems, though plenty of thin people have sleep problems and some heavy people sleep well.) I find people's inclination to blame any human characteristic they don't like on free will and lack of effort thoroughly repugnant.