If you were a pirate, wouldn't you want to avoid the navy? Maybe they were suicidal, or just wanted to get caught. Edit; nevermind: reading more than the first paragraph reveals that the navy vessel went after them. Still a dumb idea to fire on them though.
That and the silly anime/manga) "One Piece"! LOL! I almost thought that this was a "joke" topic because of the picture posted...
great a fishing boat takes on a warship i actually heard of this a few days ago, it was all over the cable news'.