These are all very good questions, which will all need to be answered eventually, and need to be considered at the platforms move forward.

A lot of these problems could be solved if Governments and business entities started running their own Mastodon servers, and other platforms (as appropriate).

Unfortunately government and businesses are increasingly outsourcing their IT infrastructure to commercial cloud services, rather than keeping them in-house.

ActivityPub is a major threat to the commercial social networks.

These laws are purely a way to regulate communication, but they are effectively a way to prevent new social networks from becoming established.

This is why the really big social networks are welcoming them with open arms. Even the criminal social networks are secretly pleased with them.

Laws only affect people too poor to manipulate them and too honest to disobey them.