Occupy Wall Street protesters using Android phones should definitely invest in the 'I'm Getting Arrested' app. This app was designed to let people send out a mass text message to pre-set numbers in the event that they are arrested.
The app was inspired by a real life incident at an Occupy Wall Street protest where a friend of the app's creator, Jason Van Anden, reportedly came "one nightstick swing away from being arrested," according to laughingsquid.com. The app is easy to use, requiring you only to input your message and contact numbers. The app is activated simply by pressing down on a big bulls eye in the middle of the screen.
The I'm Getting Arrested app is available for free in the Android app store.