Last week, as Baltimore braced for renewed protests over the death of Freddie Gray, the Baltimore Police Department (BPD) prepared for battle. With state-of-the-art surveillance of local teenagers’ Twitter feeds, law enforcement had learned that a group of high school students was planning to march on the Mondawmin Mall. In response, the BPD did what any self-respecting police department in post-9/11 America would do: it declared war on the protesters.