I don't really get my fat hate on IRL because I don't want to be a pariah but I do call people out on health-related bullshit. I was at lunch a few weeks ago and one of the fat girls there was talking about how she's been going to the gym every morning and only eats 1000 cals a day but can't lose weight. I asked her if she used MFP to track her calories and if today was a < 1000 calorie day. She confirmed that it was. So I talked her through what she'd just eaten and explained that her lunch was about 1000 calories so if she ate anything else that day she was going over. She was pretty angry about it and sort of argued feebly but I actually think she realised what she'd been doing (understimating portion size in MFP, skipping liquids or snacky sides, deliberately picking the MFP entries with absurdly low calories). Hopefully she remembers that and doesn't just repress it and next time I see her she's actually thin.