Several years ago, if you were a teenager and looked at a diet video on YouTube, several of the videos on the right hand side would be thinspo anorexia videos because those things were better at keeping people's attention. If you looked at the 9/11 videos, it would give you Alex Jones Infowars 9/11 conspiracy theories. YouTube recommended Alex Jones conspiracy theories 15 billion times in the right-hand sidebar, which is more than the combined traffic of The New York Times, Fox News, MSNBC, The Guardian, etc. combined.