There's still a tiny window of opportunity for engineers to come up with or design technical safeguards, but eventually this problem will move past the realm of what's easily solvable and out of our hands, and into policy makers hands. A big part of me feels like that window is already slammed shut.
It's hard to distinguish who's a bot, who's a narrative pusher and who's an enthusiast. Which is exactly what you'd want from an astroturfing campaign. There's a clear benefit: people in the industry are reading this, and in doing so they're granting mindshare.
There's one way that can prevent inauthentic support campaigns - personal key signature. But judging by how afraid people, especially in the US, need to be of their government surveilling them, this isn't going to catch on.
This phenomenon appears to be incrementally coming for every single topic and public platform.
(It's interesting that conservatives saw it as a partisan cause.)