I find it very unlikely that an Admin/GM has even bothered to tell anybody who is on what ships.
There isn't a service.
The person, in question, was quite likely 'pulling your leg'.
And possibly, knowing your great 'love' for Admins/GMs, it may appear to have had the desired effect.
How do you know that the Pirate wasn't a Member/Ex-Member of Gateway?
'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