https://www.cnet.com/news/livestreaming-on-facebook-twitter-and-youtube-needs-radical-change/

As he prepared to carry out his heinous act, he quipped, "Remember, lads, subscribe to PewDiePie." Then his followers watched for nearly six minutes as he streamed video from the massacre that otherwise could have looked like it came from Call of Duty, Battlefield or any other realistic war simulation game.

It was a shocking reminder that the magical devices tech companies create to give us access to nearly all human knowledge and easy ways to take photos and connect with friends, have a darker, more grisly side.