Identity theft would be the way to go there. Stealing a pirate ship is a pretty badass piratey way to become captain.
Discussion
The trick is to buy it through an LLC and them embezzle it. Lawyer-Pirate.
Too much suit.
Too little peg-leg and flint-lock.
The cornerstone of being a pirate is you get to pirate how you want to pirate. But I do have a daily carrie with me everywhere except ironicaly in the Courtroom where I'm not allowed to have it.