In the hours between the shooting spree at Umpqua Community College and the moment news networks were able to name Chris Harper Mercer as the alleged gunman, crowds on social media clamored for a name to fill the informational void. 4chan gave them two, both of whom turned out to be alive, and neither of whom has been named by authorities in connection with the tragedy. For a couple of hours, though, mobs on Twitter and Facebook believed these were the guys, and openly speculated about what drove them to do it.

This is a map of Japanese nuclear power plants that was featured on Monday's episode of Fox News' Your World With Neil Cavuto This is The International Atomic Energy Agency's list of Japanese nuclear plants. You might notice that "Shibuyaeggman" appears on the Fox News map, but not on the IAEA list. Probably because it is actually a nightclub. Media Matters' Simon Maloy explains: