@volts.wtf There's the takeover from above, with the consolidation of media empires, Rupert Murdoch, etc.
And then there were the networks of fascist activists who disrupt any forum that isn't aggressively moderated.
We knew, in the "blogosphere" era, that Newt Gingrich's wing of the Republicans, Frontpage Magazine, among others, were actively coordinating attacks on liberal and left bloggers. They had newsletters where they discussed talking points which they'd spam widely.
@volts.wtf I think people are afraid of sounding like conspiracy nuts, and I can understand that.
Everyone should watch the first episode of 'Century of the Self', to understand the science behind modern political propaganda.
Then read three works by David Brock: Confessions of a Right-Wing Hit Man (Esquire mag), Blinded by the Right, and The Republican Noise Machine, which detail the GOP media operation since Nixon's time.