Greenpeace is now and always has been a completely non-violent direct action organization which occassionally uses civil disobedience to stop and/or draw attention to environmental looters.

I'm not familiar with this particular case, but if the circumstance is what Bobert described, ie that two Greenpeace members boarded a cargo ship wearing t-shirts that drew attention to the fact the ship was carrying illegal cargo, artbrooks suggestion is just downright looney.

I'm quite sure that the Greenpeace action made the crew feel pretty uncomfortable. But the crew bloody well ought to feel uncomfortable if they are involved in illegal trade.