Reply #6: The Steve Irwin crew, of Sea Shepherd don't shun violence.

[tekisui]

Greenpeace maintains non-violence, but Sea Shepherd is willing to stop whaling at all costs, including ramming vessels.

The Steve Irwin also has machine guns, but they have locked them in the basement of the ship. They could get aggressive in trying to get their crew back, but I assume as long as no whaling is going on, they are succeeding.