You shouldn't confuse legality with morality. Pointing out that something is illegal is not a very compelling argument that it's wrong. Imagine how ridiculous it would sound to chastise the Egyptians for breaking their curfew.
So you're saying intimidation, harassment and restricting speech is morally OK as long as it's loosely tied to an issue that you personally agree with?
People have been whining about how the DDOS is restricting the speech of MasterCard, not realizing that it has nothing to do with speech, and everything to do with adding an economic incentive to do the right thing.
While it also may be 'restricting speech' (corporate personhood has come a long way...) that's a side effect, not the reasoning or purpose.
