How ‘Doxxing’ Became a Mainstream Tool in the Culture Wars - The New York Times

On a related note, check this Ezra Klein podcast interview with Angela Nagle: From 4Chan to Charlottesville: where the alt-right came from, and where it's going

"“Originally it was little black-hat hacker crews who were at war with each other — they would take docs, like documents, from a competing group and then claim they had ‘dox’ on them,” said Gabriella Coleman, a professor at McGill University who wrote a book about the hacker vigilante group Anonymous. “There was this idea that you were veiled and then uncovered.”

Now the online hunt to reveal extremists has raised concerns about unintended consequences, or even collateral damage. A few individuals have been misidentified in recent weeks, including a professor from Arkansas who was wrongly accused of participating in the neo-Nazi march. And some worry that the stigma of being outed as a political extremist can only reinforce that behavior in people who could still be talked out of it."

How ‘Doxxing’ Became a Mainstream Tool in the Culture Wars - The New York Times