According to BuzzFeed News, then-Twitter CEO Dick Costolo secretly ordered employees to filter out abusive and hateful replies when President Barack Obama conducted a May 2015 #AskPOTUS town hall.
A former senior Twitter employee told Buzzfeed that , Costolo ordered employees to use an in-house algorithm to firewall against abusive language directed at Obama. Twitter went further than that, according to another source, who intimated that the media partnerships team manually censored tweets because the algorithms were not always effective.
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