Videodrome:

… on Wednesday, the video that was auto-playing in everyone’s feed showed the murder of two people. It’s impossible to tell how many people saw the video (though Facebook’s version of the video was shared 500 times before it was taken down), but user reports suggest that thousands and thousands of people witnessed—without being warned ahead of time or knowing what they were getting themselves into—a brief, vivid, and unmistakable snuff film. […] … There is some question as to whether media outlets should be showing these videos at all. In 2012, the sociologist Zeynep Tufekci wrote for The Atlantic about research suggesting that mass shootings, like teen suicides, are contagious: that by describing the specific method and setting of the killings, law enforcement and the media can prompt more of them.