I'm no fan of the current war on "misinformation" — if anything, I'm a conscientious objector — and one of the reasons is the term's pedigree.
The effort by public and private sector alike to hunt down misinformers to keep them from misinforming the public represents a return to the bad old days that once upon a time liberalism sensibly opposed.
First, as to the word itself.
The Oxford English Dictionary traces "misinformation" in its current sense to the late 16th century. In 1786, while serving as ambassador to France, Thomas Jefferson used the word to deride the claim that the U.S. Congress had at one point sat in Hartford, Conn. In 1817, as every first-year law student knows, the U.S. Supreme Court used the word as part of a shaky effort to define fraud.
In the run-up to the Civil War, supporters of the newly formed Republican Party denounced as misinformation the notion that they harbored "hostile aims against the South."
Depending on context, the word can even take on a haughty drawing-room quality. Sir Hugo Latymer, the protagonist of Noel Coward's tragic farce "A Song at Twilight," discovers that his ex-lover Carlotta believes that she has the legal right to publish his letters to Hugo's ex-lover Perry. Says the haughty Hugo: "I fear you have been misinformed." (Writers have been imitating the line ever since.)
True, according to the always excellent Quote Investigator (QI), a popular Mark Twainism about how reading the news makes you misinformed is apocryphal. QI does remind us, however, that there's a long history of writers and politicians using the term as one of denunciation.
Which leads us to the pedigree problem.