Anonymous, a band of online vigilante activists, has turned its ire on the U.S. Department of Justice, threatening to release secret, internal documents the group hacked in memory of Aaron Swartz, the Internet prodigy who committed suicide before his federal trial. “With Aaron’s death we can wait no longer. The time has come to show the United States Department of Justice and its affiliates the true meaning of infiltration. The time has come to give this system a taste of its own medicine,” read part of the message and video posted on the U.S. Sentencing Commission website, which the activist...