From Kimball's News, Fake News, Very Fake News: A Primer:
We were chatting with a couple of other people about this and that when someone she knew from the Times joined in. I then overheard him explain to her that she had to be careful about what she posted on Facebook, Twitter, etc., because anything too explicitly anti-Trump could be used against her when that glorious day came and "they" -- the conventional fraternity of groupthink scribblers -- finally took down that horrible, despicable man.
"We've got dozens of people working on it all the time," he explained, adding that it was only a matter of time before they got the goods on Trump and destroyed him.
There in a nutshell, I thought, is the existential imperative that has been so gloriously productive of fake news and its exacerbated allotrope, first delineated by Donald Trump in his famous media-bashing presser on February 16, "very fake news."