Facebook's struggle with fake news has been widely reported and the issue is still a hot topic in the days following the US presidential election. The Washington Post caught up with Paul Horner, a man who has made a living off of news hoaxes over the last few years, some of which got picked up by the media and the Trump campaign as legit stories.

"His followers don't fact-check anything -- they'll post everything, believe anything," Horner said. "His campaign manager posted my story about a protester getting paid $3,500 as fact. Like, I made that up. I posted a fake ad on Craigslist."