The burgeoning pro-democracy, anti-Trump movement known as 50501 expects to drive tens and possibly hundreds of thousands to protest in 1,000 cities and towns on Saturday.
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Facebook, Twitter and Instagram Surveillance Tool was Used to Arrest Baltimore Protestors
For years, the social media giants have provided data to Geofeedia, a company marketing surveillance tools to police, creating real-time maps of activity in protest areas that were later used to identify and arrest protestors.
