Yes people should learn to take criticism constructively. I realize from observing my obese father that he is fat because of his closed mindedness to believing that a different diet will help him lose weight. It's this closed minded mindset to improve one's self that I really hate more than anything. Reddit Ellen Pao shutting shown /r/fatpeoplehate also exemplifies and endorses this mindset by closing down subreddits and accounts ridiculing her.