On March 14, 2013, the indictment came down: 26-year-old Matthew Keys, a celebrated social media journalist, Twitter power user and full-time editor at Reuters, had been charged in a federal criminal case. In the indictment document, published by Politico, the Department of Justice alleged that Mr. Keys had conspired with the hacktivist collective Anonymous to gain access to the Los Angeles Times’ website by providing some of the group’s members with the usernames and passwords that allowed them to deface at least one story posted there.