I don't get it however.
How are we supposed to know how fictional characters would behave. And by fictional I don't mean what one may think, because we all know they are fictional, but they are pirates, not students. Making them students is so unfitting (at least for some) we hardly can accurately imagine how they will realistically behave in such an out of the world context without committing mistakes due the nature of the concurrent manga in which they live, which makes them totally inadequate. So we can't predict their reactions, specially in the long run.