An Eye for an Eye?
Anonymous have been called terrorists and vandals, and people claiming to have affiliation with the group have been arrested.
Aside from the potential damage of the various leaks of user data from big companies that should have known much, much better, Anonymous has done little wrong other than disrupt the odd website for a few minutes until the administrators were able to restore a backup and get things back to normal.
That isn't terrorism any more than daubing graffiti across a poster is. Vandalism, perhaps, but given their targets are always corporate giants whose treatment of a certain section of society is questionable, at heart the activity of the group is little more than an online protest, civil disobedience of the kind regularly seen on TV screens currently as the Occupy movement gains regular coverage in their protests against government bailouts of banks with taxpayer's money and the close relations of government and large business that led to it.
In fact, I would even go so far as to suggest that Anonymous made the Occupy movement possible, leading the way for the protest to succeed by encouraging the embracing of social media to harness people power and empower those that feel ready to take to the streets to demand change. A quick look at how Anonymous gathered forces in reaction to the shooting of a drunk on the Bay Area Rapid Transit (BART) system and the subsequent shut down of cellphone towers will reveal how adept they are at striking back, in this case by taking the BART website offline and exposing its poor customer security. But that was only their online response.
To really make their feelings about this injustice felt, Anonymous was able to mobilize people on the ground, furnished with "V for Vendetta"-style Guy Fawkes masks who were present to physically protest against the disproportionate reaction of the security team against the deceased man. Afforded an opportunity to join a protest organized by a group as notorious as Anonymous, many people turned up to take part, an example of just how fluid and flexible the whole movement is. One minute you're a part of it, you're anonymous and you can state your argument via protest; the next, you're back to being Julie, working at the local bookstore.