A registry or restricting Camera ships won't get us anywhere. People will feel like the extra steps are too bothersome - I would for sure. Right now, you can take any restart, sell the starter goods, go to conn, buy the camera ship and return to the game. It is intentionally easy. It takes less than fives minutes.
A registry would make changes necessary. People would need to create the ships, post the names and such and they couldn't simply delete them after the recording (that is what I do). Whenever there is a need for me to record something from a scenic aspect, I just create a new one, give it a random name, Freelancer ID and preferably no IFF (civ restarts).
By extension, restricting camera ships would merely result in people using Stargazers with rank <29 and/or Recruit ID. As I said, if people want to annoy you, they will do. It is easier to just either remind people of the infocard of camera ships or in the actual case, report them. For example, when you see them being in the same group as the enemy during the fight. Let's not make a problem of such a little thing that annoys a few people in rare situations.