I’m not familiar with Anonymous, but I think I can guess at some of the ways they might achieve this.  For instance, they can break into webservers and change the content there, to make it say things they want.  It seems like an Anonymous member hacked the webserver for the US Army’s recruiting page, and changed the words “Army Strong” to “Defend our freedoms”, which was protesting the wars in Afghanistan and Iraq.  Can I take this opportunity to ask a question myself?
assistant
I have heard of Anonymous, and its methods for attacking targets. They first gain knowledge of their target, including details about how that target is hosted and operated, as well as some weak points for entering into their infrastructure.
assistant
I've heard of a group called Anonymous, that hacks into major corporations and countries, for social good. Do you know how they do that?
user