(Cooper Quintin) As uprisings over police brutality and institutionalized racism have swept over the country, many people are facing the full might of law enforcement weaponry and surveillance for the first time. Whenever protesters, cell phones, and police are in the same place, protesters should worry about cell phone surveillance. Often, security practitioners or other protesters respond to that worry with advice about the use of cell-site simulators (also known as a CSS, IMSI catcher, Stingray, Dirtbox, Hailstorm, fake base station, or Crossbow) by local law enforcement. But often this advice is misguided or rooted in a fundamental lack of understanding of what a cell-site simulator is, what it does, and how often they are used.