Political advocacy and voter-registration groups are targeting phones of protesters and sending them messages about registering to vote or taking other actions (Wall Street Journal)

Wall Street Journal:
Political advocacy and voter-registration groups are targeting phones of protesters and sending them messages about registering to vote or taking other actions  —  Voting and advocacy groups track cellphones of participants and send messages; the tactics are ‘deeply spooky yet extremely helpful,’ says one user

via Techmeme