An endless loop of AI generated content that gets posted to the web as original human generated content, with LLMs getting re-trained on this content and spitting out more content that also gets re-posted, resulting in a cesspool of BS masquerading as organic knowledge. I'm old enough to remember when Google provided meaningful search results rather than just SEO spam, the problem is about to get an order of magnitud…
I suspect this will lead to a new wave of more advanced moderation techniques.
Although I hope we may see big come back of Web 1.0 forums such where users have to gain street cred and even invite referals with realy genuine contribution into community, no way to fake with AI today.