To say "Anonymous is a loose group of hackers and activists" is a tad inaccurate. For we are all anonymous, anyone who isn't using their real name and face are anonymous and to call a mass of internet will a 'group' is wholly inaccurate when the only determining factor in their decision to make a move is how furious someone can make the autonomous collective.
The collective will of the group to attack Gene Simmons and Scientology are the the results of those organizations own inconsiderate actions. Gene Simmons called for the brutal torture and rape of anyone who ever pirated a song, threatening law suits and he actively targeted and called out anonymous in his pledge. Scientology's policy of terrorism with the threat of law suits against anyone who bad mouths their actions has made them a target. For the most part the targets of Anon have always been groups with the money and agenda to seriously undermine free speech and free will.
Like Australia trying to outlaw 'A-cups' on the internet because they look pubescent, the logical person says "Really? then is it okay if she looks over 18 regardless of actual age, or should age and nothing else be the determinant factor." The illogical person calls for the damnation of all those who would dare back such and insane initiative.
I know I'm being a little off topic with my post but I'm just hoping to illustrate the actions of a few more troll-like individuals are not the whole of anonymous, and do not represent anonymous, for both you and I are anonymous.