Fake news is serious.

Three days ago a man entered a pizzeria in Washington DC, heavily armed, and began shooting. He said he was investigating a ring of pedophiles.

Here's info from the Washington Post:

The restaurant's owner and employees were threatened on social media in the days before the election after fake news stories circulated claiming that then-Democratic presidential nominee Hillary Clinton and her campaign chief were running a child sex ring from the restaurant's backrooms. Even Michael Flynn, a retired general whom President-elect Donald Trump has tapped to advise him on national security, shared stories about another anti-Clinton conspiracy theory involving pedophilia. None of them were true. But the fake stories and threats persisted, some even aimed at children of Comet Ping Pong employees and patrons. The restaurant's owner was forced to contact the FBI, local police, Facebook and other social-media platforms in an effort to remove the articles.
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What to do? Talk with friends and family and explain that something can look like news but not be news. Social media is not the place for information about national and world affairs.