What damage did they do? Who did they harm?
They are lucky Russia did not just shoot them as they attempted to storm the platform. And that would include firing on the ship.
Or do you think it is ok and lawful to break into other peoples property?
You failed to answer either of my questions. That is likely because as we both know, the answer to them is "none" and "no one".
The oil rig is an industrial facility, not a residence or domicile. They were unarmed when they climbed on so I'm not really certain "stormed" is an appropriately descriptive verb.
They did break the law. It was civil disobedience. The big question, which Putin seems to have answered, is should they have ever been charged with piracy? That answer to that, of course, is no.
Why are you hostile towards Greenpeace? Are you hooked on the taste of blubber?