Why do you assume the opposite of "fat shaming" is "fat acceptance"? Especially when I talk about the distortions of language caused by people's shifting perceptions?

Fat shaming doesn't help fat people lose weight. It just makes them feel bad about themselves. It may well make some people eat more. It polarises the debate, and pushes some people into the fat acceptance camps.

Fat shaming is harmful.

Note that fat shaming is different from being honest about body weight.