Not by a single lunatic operating from their bedroom.
Lunatics in bedrooms have been distributing pamphlets since the invention of the printing press.
"Back in my day Walter Cronkite told the truth, the whole truth and nothing but the truth about the Gulf of Tonkin incident"
(never mind the fact that he didn't even have the full truth available to him but you get the point)
But this also means there’s more competition for attention, because now all lunatics can post from their bedrooms. The institutional media (including legacy) still maintain strong presence.
Of course, a great deal of panic over fake news wasn’t necessarily over fake news per se, but whose fake news and the loss of control over the “official narrative” that legacy media used to have a monopoly over. This isn’t a vindication of the heaps of slop published on the internet, just a more synoptic take IMO.
People miss Cronkite, because that style of media made them feel certain in their opinions and in “official consensus reality”, regardless of whether it was true or not and whether it was a trustworthy authority or not.
The whole hysteria about 'fake news' 10 years ago was apparently an outrage against the public being duped, whereas is was in fact frustration that spreading fake news has been democratised.