There is no problem of moderation in decentralized systems, never was and never will be. Any system already assumes that you don't subscribe, follow or participate in things and communities you don't want to and you discover, choose and filter all the things you want yourself. That's how everything in the world works. Everything is inherently self moderated.

But there are actors who want to control the spread of information, have some global censorship features in every system with censorship decisions delegated to people who they can influence. These actors are also the ones who invented CP problem to be able do whatever they want to any target with public approval, like making bogus CP claims on anything that doesn't have a global censorship system to force creation of one. They may even upload CP themselves if necessary.

The good thing about ideologies though is that they do push people to protect ideological beliefs. You can't just CP your way into censorship on people with strong believes against censorship.