Oh good grief; stop believing in fairy tales. There is no “anonymous” beyond geeky kids in their parents basement thinking sending threatening emails through a proxy server to a bank that is in Mexico saying “we know what you do and who you are” when they don’t have a clue is an attack.
Macquire, why are you so hot about them? Take a chill pill and relax. It’s Saturday. Go watch a football game or something.
It really doesn’t matter what the nature of “anonymous” is, kids in mom’s basement, or a serious collection of seasoned cyber professionals, because just making the claim they do and the intended recipients of the threat takes some serious gonads.