Look at it this way.
Are there real terrorists around the world that wish to cause death, chaos and, well... terror to "Western" countries? Sure.
Are many of them backed materially/financially, trained, manipulated, ordered or at least manipulated by the CIA and similar to meet their own agendas? YOU BET!
So I look at at LEAST a portion of Anonymous in the same light. At it's inception and still it may be decentralized and how a multitude of members with no one person "in charge". But this leaves a HUGE gap where alphabet soup types can come in under the Anon logo and cause mayhem for the sake of... FURTHERING THEIR OWN AGENDA! Has Anon done some great things, YES. Can we be certain sure that 100% of Anon is not working to further the usurpation of the rights of the American Citizenry? NO.
Remember Mulder, Trust NO ONE...