Interesting backgrounder https://www.newyorker.com/news/news-desk/inside-the-team-at-facebook-that-dealt-with-the-christchurch-shooting on what went on at Facebook in the aftermath of Shooty McShootFace posting his “manifesto” rant and live-streaming his murderous rampage.

Note that it took Facebook about an hour to determine that the video should be taken down. Was this too slow? Is there ever a time when leaving footage of such carnage up can serve a constructive purpose? Yes, surprisingly, there is.

Further commentary: https://www.techdirt.com/articles/20190425/15315242087/behind-scenes-look-how-facebook-dealt-with-christchurch-shooting-demonstrates-impossible-task-content-moderation.shtml