If Twitter hasn’t suspended or banned you yet, don’t feel relieved. You may be next. When Twitter and other big tech companies started banning fringy rightwing characters over the past year or so, few people objected, because even most conservatives weren’t sympathetic to those purged. It’s hard to feel sympathy for conspiracy theorist Alex Jones. But once the radicals were banned, it became far easier to ban others. Now, people tend to talk about public issues mostly on the big tech platforms. Minority viewpoints can use them to get around the mainstream or legacy media. A biased article in The...