Does this mean that I could train an LLM to do something like spread fake news? Would that even scale?
That said, I'm assuming you also mean fake news which is (A) believable and (B) is tailored for a particular agenda.
This could be pervasive through not just online discussion forums, but also online news articles, auto-generated YouTube/TikTok feeds, pages inserted into search results that are custom generated on-demand, conversations on dating apps, etc.
Would it scale? Sure it would.
My assertion is that things like this will happen whenever LLMs are tuned to match political beliefs.