Gabriella Coleman, assistant professor of Media, Culture, and Communication at New York University, was interviewed by Bob Garfield of NPR's On the Media about the structure and intent of "Anonymous" -- a community of unidentified digital activists. Most recently, "Anonymous" has participated in protests against Governor Walker of Wisconsin and against governments in North Africa and Egypt.
The interview discusses denial of service attacks performed by Anonymous as a form of civil disobedience. Denial of service typically means flooding a server with so much activity that it can no longer function. Coleman indicates that the group has a complex structure whose membership does not consist of stereotypical computer hackers.
A transcript and podcast of the interview is available through On the Media.