I don't feel bad either, but I kinda understand why people do stupid shit like that, from a personal point of view plus I have some hypothesis about extreme (EG carnivorous) diets in men. I believe it's an eating disorder in a lot of cases, manifesting in a way that's more difficult to grasp than "simple" bulimia, anorexia or orthorexia. For the outsider it's a seemingly arbitrary dietary restriction, from the inside it's most likely something a lot more complex. Dunno if there are any studies on this.