Basically, we've learned that the current laws against threats, defamation of character, slander, fraud, false advertising, etc. fail catastrophically at handling those crimes/torts when they occur in large decentralized online communities.

Governments have no idea how to tackle the problems, so it's either private corporations that directly host these communities do it or nobody does. And that means going more years with a growing population that is getting radicalized by the above false information.