If bot/organized posts are properly classified as spam then surely the factual accuracy of someone's postings don't really matter anymore, as anything "inaccurate" falls into the realm of "opinion" or just human error. Presumably it's ok to be wrong.
So I don't see any problem with a person believing that e.g. Epstein was killed, and posting online about this belief. I don't see a problem with grassroots communities arising around this belief. It only seems to me to be an issue when such postings are sponsored/encouraged because of e.g. some political aim, and proper spam detection would mitigate this.
Paul Julius Reuter worked at a book-publishing firm in Berlin and was involved in distributing radical pamphlets at the beginning of the Revolutions in 1848.
https://en.wikipedia.org/wiki/Reuters#History
Besides, the problematic part with "news" involve "non-factual" news but rather political "news". Whether globalism is good or bad. What, if anything, to do about climate change. Nonsense like veganism, etc. There, by nature, can't be fact-checked because it is a value/contextual judgment rather than a factual one. Capitalism vs communism, nationalism vs globalism, immigration vs nativism, alt-right vs alt-left, traditional media vs social media, etc.
Nobody in charge needs to (or even can) decide if something like globalism or communism is good or bad, just that no obvious lies are spread while discussing it.
As someone said, we live in strange timeline where comedians are more trustworthy than politicians.