"As stated in our terms of service and privacy policy our service is not to be used for illegal activity, and as a legitimate company we will cooperate with law enforcement if we receive a court order"
And then this:
"In 2005 we setup HMA primarily as a way to bypass censorship of the world-wide-web whether this be on a government or a corporate/localized scale."
If censorship is government driven, it means that the law prohibits you to see some things. If you still do it, you get arrested because you are breaking the law. This is an illegal activity and they should cooperate with law enforcement, as stated in the first point.
So, how do they decide what is illegal but permitted and what is not? If they allow some illegal behavior and not some other, they are actually judging the morality of an act, and not if it respect laws.