Hiring some "ministry of truth" invites the biases of the "ministry of truth" you hire. I am dubious about them being impartial as to political ideology, but expect them to bow to SJW pressure and become tyrannical.
Reddit uses a better method--the users themselves identify a BS posting and down-vote it into oblivion. The setup of facebook allows BS to go viral with no check from its regular users.
What they should do is label stories based on political slant. Why go through the effort to lose whatever shred of credibility they have left? If it is liberal news, say it. If it is conservative news, say it.