Notably, Facebook isn't taking the Perkins video down. While it will remove clips that sensationalize violence, it's leaving this and other footage that it believes will boost awareness of violence and its consequences. There's a "graphic video" warning before you start watching, but there's otherwise nothing stopping you.

As it stands, it's doubtful that Facebook is about to have second thoughts about livestreaming. Any live video service has the potential to show something terrible -- and when Facebook has over 1.6 billion active users every month, that potential is stronger than usual. If the company wants to offer livestreaming at all, it'll have to accept that some videos are likely to be tragic.