Mark Zuckerberg has vowed to make Facebook great again, and Meta announced a tiny new feature that might be a step toward that goal. As part of a series of features and policies aiming to cut down on spammy content, Facebook is testing a "downvote" button for comment sections. This would allow people to anonymously downvote comments that they deem less "useful."This wouldn't be the first time something like this has come up. For nearly as long as the "like" button has existed (since 2009), the masses have ...