How does Facebook police hate speech? A recent investigative report by Süddeutsche Zeitung Magazin (SZ-Magazin), a German news outlet, shed some light on that question through leaked documents and interviews with current and former employees at a subcontractor Facebook uses in Berlin to moderate German news feeds. Watch the video below to see how the company's secret censorship guidelines are enforced in a country with some of the toughest laws around hate speech.