Sign up for the Slatest to get the most insightful analysis, criticism, and advice out there, delivered to your inbox daily. Last week, Reddit administrator Worstnerd shared a significant update to the social network’s content-moderation standards. As of March 5, “users who … upvote several pieces of content banned for violating our policies will begin to receive a warning.” They added that the company will “consider adding additional actions down the road.” On its face, the move is perplexing. Why would a website that ostensibly prides itself on giving its users and communities a platform for free speech choose to...