I’m not sure of the point of this, considering that the damage has already been done.

https://www.recode.net/2017/11/22/16689744/facebook-google-twitter-russia-election-disclosure

Facebook is trying to alert some U.S. users that they fell victim to Russian propaganda during the 2016 presidential election.

In the coming weeks, the social giant plans to roll out a new tool so that users can check if they followed or “Liked” pages and accounts — on both Facebook and Instagram — that the Kremlin quietly set up over the past two years in order to sow social and political unrest, the company announced Wednesday.

Only a slice of the roughly 140 million users who may have seen Kremlin-backed content on Facebook and Instagram during the 2016 election can take advantage of Facebook’s new portal, which will soon become part of the site’s Help Center. That’s due in part to technical limitations, the company contends.

But the move nonetheless comes as the tech giant tries to assuage its critics in Congress while further working to “protect our platforms and the people who use them from bad actors who try to undermine our democracy,” Facebook said in a blog post Wednesday.