Yes, I do, and I'll tell you why.
I respect and agree with their ideals now, and if they weren't the ones who hacked PSN, then I agree with some of their action too. *BUT*
I don't know them. I don't know who they are. I don't know if their ideals change, for whatever reason, they decide to go rogue. They split up, and decide to wreak mayhem. They've proven that although seemingly unstoppable, they are capable of a lot of damage before they get caught anyhow. As long as they don't go Fight Club, I don't think anyone has much to worry about, but if for some reason their ideals shift, we could be in for a ride.