With ICE and CBP roaming the streets, united community action is more important than ever right now — from local mutual aid groups to school safety patrols. Known for its privacy features and end-to-end encryption, the Signal messaging app has become a popular platform for organizing these community groups. Signal can be a great tool for private messaging, but it’s at its best if you know how to use all the privacy options. Not all of these options are automatic or even immediately obvious;