Fat chics can be heard
I often advise fat people to try to take up intermittent fasting to lose weight. And usually if a fat girl gets wind of my statement she comes waddling up to me and says "You have to be careful. You can cause people to have eating disorders. Anorexia is a real thing and its serious." But the way I see it is if you're fat as fuck you already have an eating disorder.
If you are ok with being 300 pounds what makes you believe you wont be ok with just being a natural healthy weight? Why do we assume that they will learn about fasting and keep not eating until they die once they lose the weight? They're already cool with being fat as hell apparently. So I dont think these people have the motivation nor the capability to starve themselves to death.