How would breaking up FB into Facebook, Instagram and WhatsApp help with this at all? They don't even share ad inventory. It looks like you're out to hurt the company and that's it.
Moderation policy is an axis of competition. Letting each platform explore moderation systems (a) let’s us compare results, (b) reduces the damage a single company’s bad policies can inflict, (c) and gives users on both sides alternatives if they disagree.
Look through my posts in this thread. FB causes shitstorms of damage not the least of which is aggregation / indoctrination of dissention through isolation.
FB is basically pushing monsters outside of its gates in hopes they "go away". They wont. lol.
Also there are legal practices call "punitive damages" so yes there exists legal statutes for punishing things that we determine we dont like.