Twitter and Facebook Trending Topics incidents highlight emerging social media bias

According to a report in Buzzfeed, former Twitter employees have said Dick Costolo filtered tweets during the #AskPOTUS townhall, the President's Q&A session in May last year. Costolo reportedly asked for a new algorithm that could filter abusive tweets, but didn't stop there. He also asked the media partnerships team to manually censor tweets in case the algorithm was inconsistent