Wiping out the bots would absolutely destroy the user counts of most social networks, so it's just not going to happen.
On the other end, there are a lot of formerly credible sources of information that have stepped in it badly and repeatedly, and tarnished their aura of authority. The fourth estate is looking more and more bought and paid for, and the academy has their own issues there, not to mention a mother of a reproducibility problem.
With Twitter and Instagram, it feels like there are more bots than real people. Facebook, I'm less sure of, but with as many random friend requests as I get from unknown "people" with half-baked profiles and no connections, it's happening there too.
On the other end, there are a lot of formerly credible sources of information that have stepped in it badly and repeatedly, and tarnished their aura of authority. The fourth estate is looking more and more bought and paid for, and the academy has their own issues there, not to mention a mother of a reproducibility problem.