ADVERSARY TECHNOLOGY: How Your Phone Betrays Democracy. “In the United States, and across the world, any protester who brings a phone to a public demonstration is tracked and that person’s presence at the event is duly recorded in commercial datasets. At the same time, political parties are beginning to collect and purchase phone location for voter persuasion. . . . Within minutes, with no special training and a little bit of Google searching, Times Opinion was able to single out and identify individuals at public demonstrations large and small from coast to coast. By tracking specific devices, we followed demonstrators from the 2017 Women’s March back to their homes. We were able to identify individuals at the 2017 Inauguration Day Black Bloc protests. It was easy to follow them to their workplaces.”