Who’s Stalking Whom? ICE Uses Social Media and Phone Surveillance System to Track Protesters

ICE uses PenLink's surveillance system to track protesters through social media monitoring (Tangles) and location data (Webloc), gathering information on hundreds of millions of devices without warrants. The tools scrape social media, enable watchlists with AI sentiment analysis, and map phone locations around areas of interest. This commercially available data from data brokers raises Fourth Amendment concerns and highlights how mobile devices expose detailed personal information that law enforcement can access without traditional intelligence channels.