In the name of national security, former South Carolina governor and current Republican presidential candidate Nikki Haley wants to use government authority to ban anonymous speech on social media platforms. “Every person on social media should be verified by their name,” she told Fox News. No matter how many nefarious images of Russian or Chinese disinformation agents one conjures up, this is a no-good, very bad idea. Anonymous speech is a hallowed American tradition. It’s hardly an exaggeration to say that if it had never been permitted, the United States as we know it may never have existed. Letters from...