Close up of three masked "Anonymous" protesters on September 11, 2011 and on September 17, 2011.
Police will often photograph demonstrations and rally is another reason for the masks.
Anonymous is a group initiating active civil disobedience and spread through the Internet while staying hidden, representing the concept of many online community users simultaneously existing as an anarchic, digitized global brain.
It is also generally considered to be a blanket term for members of certain Internet subcultures, a way to refer to the actions of people in an environment where their actual identities are not known.
Blindfold Justice - GOR-83214-11
Anonymous - GOR-83802-11
Anonymous - GOR-83818-11