Four months ago, James O'Keefe caught multiple Twitter employees on undercover video discussing how algorithms are used to "shadowban" their conservative users. What's a shadowban? It's basically stealth censorship that throttles or hides a user or his content from some or all of Twitters users. There are no warnings. Everything looks the same to the user, except he's largely tweeting into a void. Twitter, of course, denied that the employees were speaking for the company or that Twitter uses shadow bans. This week's announcement that Twitter will be using algorithms that analyze user behavior to downgrade or hide tweets from...