Brazil blocked the social network X on Friday after its owner, Elon Musk, refused to comply with a Brazilian judge’s orders to suspend certain accounts, the biggest test yet of the billionaire’s efforts to transform the site into a digital town square where just about anything goes. Alexandre de Moraes, a Brazilian Supreme Court justice, ordered internet providers to block access to X across the nation of 200 million because the company lacked a necessary legal representative in Brazil. Mr....