That's only the first step in the degradation. In a worse case scenario, where AI-generated crap is not contained, imagine this: young and still immature humans "learning" their styles of writing, information, and social expectations from content generated by AI that itself trained on AI-generated content─and then more AI trains on content generated by these humans that were trained on AI-generated content. And on, and on, and on...
(I'm not always as doom-and-gloom as it may seem, I'm just in a pessimistic mood today for some reason)
We should ask questions like "Can countless AI's fracture society into a million sub societies disconnected from the reality around them".
This has about as much chance of working as the evil bit.