I guess it depends what you mean by "pirating." If you mean some thing based on morality or justice, the copyright holder is not getting their promised share of the revenue, so (regardless of how much you actually care about that) the site is in the same boat as The Pirate Bay there. If you mean "legal" then the immediate question becomes, legal where? Rojodirecta was "legal" too, remember? Didn't stop the U.S. from seizing their domain for a year and a half.[1]
What's that line? "The truth is not a bulletproof vest."
"If you mean some thing based on morality or justice"
We must have stopped talking about copyrights. Copyright is a system for promoting the progress of science and useful arts, according to my country's constitution (assuming we still care about that).
"promised share of the revenue"
So much for a market-based system where businesses are not "promised" revenue.
"the site is in the same boat as The Pirate Bay there"
On the forefront of using a revolutionary communication system to deliver creative works to people, despite constant attacks by greedy anachronistic businesses who failed to adapt to a changing market?
What's that line? "The truth is not a bulletproof vest."
[1] http://arstechnica.com/tech-policy/2012/08/government-goes-0...