Why Twitter banned the bot that unmasked neo-Nazis. (Hint: Neo-Nazis)

Twitter's number one goal in 2017 was curbing abuse and cracking down on hate speech. But when one intrepid Twitter user tried to help with the problem, the company shut down his efforts.
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Yair Rosenberg, a senior writer at Tablet Magazine and reporter, with the help of developer Neal Chandra, had created a Twitter account named "Imposter Buster," Rosenberg wrote in a New York Times op-ed this week.
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