The American Civil Liberties Union recently uncovered evidence that led Twitter, Facebook and its Instagram subsidiary to stop sharing data with Geofeedia, a firm accused of improperly collecting social media data on protest groups, and sharing that information with numerous law enforcement agencies. Geofeedia, a developer of location-based analytics, had been marketing its technology to law enforcement agencies. It was used for such purposes as monitoring Black Lives Matter protests in Ferguson, Missouri, and Baltimore, Maryland, according to the ACLU. The ACLU of Northern California uncovered the practice after requesting public records information from 63 law enforcement agencies in California. The documents revealed that Instagram had provided Geofeedia access to streams of user posts, called the “Instagram API,” until that practice was terminated last month, according to Matt Cagle, technology and civil liberties policy attorney for the ACLU of Northern California. The d