I don't know why it's out of consideration that people are just shameless slobs now and that's a major component of the obesity epidemic. Bastardy, tattoos, and dressing like a sloppy clown in public were inconceivable 40 years ago when everyone was thin. Anything goes now (no one will call your bastard a bastard), and so does being a gluttonous fat ass, really. The social consequences are minimal.

I'm around a fair number of fat people and I don't need any nutritional science background to notice they eat very often and they eat a lot. I suppose there's clinical evidence that low carb diets work, but it pretty much seems to me the main factor is these people just don't care about being fat slobs.