I know that some Corsairs were involved in the attack on Clew Bay, no idea about The Lost Dutchman and BMM Goldgeist.
Then the Corsairs should have (realistically they, in my opinion, should do their own RP and Attack Declaration anyway) should not be included in your Attack Declaration and should have posted their own.
'I would like to be half as clever as some people like to believe they are' Life is full of disappointments, it is how we handle them that helps to define us, as a person