Facebook didn’t get the memo about fake news. Of course it didn’t.

Facebook CEO Mark Zuckerberg in his trademark gray tee. (Photo: Getty)
Facebook CEO Mark Zuckerberg in his trademark gray tee. (image: Getty)

It shouldn’t be news that fake news is a problem on Facebook and other social networks: We’ve had decades of practice with hoaxes, urban legends and other fraudulent “facts” floating around the Internet.

It’s been 21 years since Snopes.com founder David Mikkelson began busting myths online, seven years since FactCheck.org had to debunk fake reports about Snopes’ funding, and two and a half years since the Washington Post launched a “What was fake on the Internet this week” blog… which it abandoned in frustration just over a year ago.

But this election season saw fake news run amok. A BuzzFeed study found that over the last three months of the campaign, the 20 most-shared fake election stories got a slightly larger audience than the top 20 election stories from legitimate sites.

Commence the blamestorming

Now, some people are now wondering if Facebook’s role as a vector for fake news played a part in Donald J. Trump’s shocking Election Night win.

Gizmodo’s recent report that Facebook (FB) quashed a News Feed update to call out hoaxes because it would have nailed too many conservative sites — something Facebook denies — amped up that angst. So did the Washington Post interview with fake-news entrepreneur Paul Horner featuring this quote: “I think Trump is in the White House because of me.”

Facebook has responded with a stages-of-denial sequence, first saying this isn’t a big problem that couldn’t have made much of a difference, then taking a step to address the issue.

Last Thursday, founder Mark Zuckerberg called the fake-news issue “small” and inconsequential, then expanded on his thoughts in a Facebook post.

“Of all the content on Facebook, more than 99% of what people see is authentic,” Zuckerberg said. “The hoaxes that do exist are not limited to one partisan view, or even to politics.”

He added that “we don’t want any hoaxes on Facebook” and said the company is helping users to flag fake content.

A few days later, Facebook (along with Google) said it would ban fake-news sites from using its advertising systems. It’s unclear how they will decide which sites deserve this exile.

Friday night, Zuckerberg posted another note, saying that Facebook was working on automatic classification and third-party verification of stories and was “exploring” adding warning labels for fake news.

Zuckerberg is probably right that fake news didn’t sway the election. It almost certainly has less of an effect than the Clinton campaign’s decisions about allocating resources in the Midwest or voter-ID laws suppressing turnout in some of those same states.