It's tough to know where to stand when it comes to AI. I don't think anybody here is hoping that the fediverse be overrun with LLMs and bring about the dead internet theory.
A large part of why people join the fediverse (and the threadiverse, too) is to get away from corporatization, and AI is definitely part of that too.
I just don't think we need to go to extremes to ban AI-generated content, but more importantly, this is not a decision that can be made globally. It must be done (and enforced, however we do that) instance by instance.