I have an issue with parents fatshaming their kids because of power imbalances - because it's the parents who buy the food, and it's usually the parents who prepare the food.  If their idea of cooking is sticking a ready made frozen pizza in the oven along with some frozen french fries and serving it with pop, and their kid becomes fat, the person who should feel shame is them - so don't project that shit onto your kid. Their kid is going to be getting enough hate at school due to the shitty "parenting" choices they are making.