I really don't see all the fuss about this policy. The RM, KNF, BAF, even the Lane Hackers have policies regarding capital ship usage. The RM one is even more restrictive than this one, however I don't know about the Kusari/Bretonnia ones.
Simply put, if you can simply post on the forums/show a bit of roleplay about the purchase of your destroyer, you will be allowed. Said player is now introduced to the forums, so he can further extend his/her discovery experience.
The Battleship and Dreadnaught are more restricted, but if you can roleplay it + provide background for its production, good. You can fly it.
There are two main groups affected by the policy. Independents who roleplay, and those who don't. The ones who roleplay just have to spend a bit of their time for the registration. The ones who don't roleplay won't bother with the registering and would rather risk their character's life than spend a few minutes RP with a faction Outcast member (in the case of the Destroyer).