My personal experience is that when you hit an anorexic BMI, you still think you're fat and can't actually be anorexic. The fact that these things go "rrrrrrrreeeeeeeee I'm anorexic!!! hear me i have anorexia!!! i weigh 300 pounds!!" only serves as further proof how they're glorifying a terrifying eating disorder and trying to collect symphathy and victim points.