I do fear that as federation grows, then so too will potentially the same threats that happen on centralised social media. The fediverse is going to have a lot of vulnerable servers who won’t moderate or detect trolls & bots and over time the issue could become extremely onerous.
All large news orgs and NGOs need to do the same - federate their server which becomes the source of truth, and then mirror the content over other social media which is not federated. This may or may not include Twitter. I imagine that over time having news and reporting across social media will diminish any advantage Twitter possesses and then news orgs / NGOs might decide if they want their content on a platform like Twitter that cannot be bothered with things like stamping out bots, trolls, inauthentic actors, or supporting a free and fair press.
If a server were an obvious conduit for disinfo then other servers could defederate from it. But if it was different accounts on different servers mixed in with authentic users then it’s almost impossible to remove. What tools does mastodon / lemmy even provide to spot inauthentic behaviour? And because we’re talking different servers run in different ways there is no clear picture from above that can be formed in the same way that a centralized social media platform might have - identifying suspicious clusters of nodes or traffic.
As for federation’s future we’ll wait and see. Both bluesky and threads are talking of providing federation protocols - threads using activitypub and bluesky it’s own API. As for Mastodon & Lemmy I see a lot of positive interest in these things. The fact we’re commenting on Lemmy instead of Reddit says a lot.