I've yet to see anyone address the behavior of anonymous, and it appears as though it's been justified by most because this dude was an asshole - but why not point a finger at them both?
If you get on the news and say, "Hello Criminal Group. We have a bunch of information on your leaders that will get them arrested, we are meeting with the FBI next week", it is only reasonable to expect some attempted retaliation. I think that no one is surprised that the targeted group compromised HBGary's servers -- there are, after all, much worse things that could happen -- except maybe the HBGary people themselves, who, as we see here, were already in way over their heads.
No one addresses the behavior of Anonymous because it is completely and totally the expected reaction. The shocking thing about the story is Barr's personality and behavior, not the idea that someone will retaliate if you threaten to decapitate their organization.
If I did something illegal every time someone pissed me off, I'd be a lifer.
The silence is not an endorsement, it's just that it's so much more interesting to talk about Barr/HBGary's behavior than it is to waste time reiterating trite condemnations of script kiddies.