I agree that healthy at any size and body positivity is nonsense but I disagree wholeheartedly with fat shaming. It's not like shaming someone who's wearing a crazy shirt, they can instantly take it off if they want. Someone above mentioned shaming people having kids out of wedlock even that can have a quicker remedy. Weight loss is a process that will take time depending on how obese a person is and if they're ashamed of themselves they'll likely be as reclusive as they're allowed to be, they won't go to a gym and look to feel better with food.