I'm starting to believe in the conspiracy theory that conspiracy theories are created by a conspiracy to make rational talking points easier to attack and silence. Rational dissidents can be easily silenced if they are connected to these propaganda movements.
When there's a flood of misinformation, then it's hard for anyone to get factual information out. It's a way to censor information by flooding it with adjacent misinformation to dilute and discredit the message.
"Truth decay" is the common term for this. Usually it's considered as an attack on expertise and authority, but associating a belief with a government conspiracy is no different than associating it with any other conspiracy. "Rational dissidents" is not redundant. Being a dissident doesn't make someone rational, and being conventional doesn't make someone irrational. All such assumptions or insinuations are forms of truth decay.
When there's a flood of misinformation, then it's hard for anyone to get factual information out. It's a way to censor information by flooding it with adjacent misinformation to dilute and discredit the message.