As a first response? No. I'm just intuiting here so I may be wrong, but it seems to me that extreme action by an ever-growing fringe of society is a symptom of a larger, festering problem. As societal angst builds up over time due to systemic problems, the distribution of that angst will not be uniform. Anonymous is just one example of a subset of society where the accumulated angst is higher.

To paraphrase the saying, they're just saying what we're all thinking. They're just saying it in a way that few people approve of, but if that's the only way they can be heard, then that's what they'll do.