As people said, give us an option to filter them out of the system map, which also makes them vanish off the ship HUD too when we're in that system. We shouldn't have to see another carrier again if we don't want to.
I would also quadruple the weekly maintenance costs for any Carrier that's in a system with a station or outpost already. Call it a tax duty or something. You want to bring your own personal "station" to a system that already had an existing one, then you better be prepared to pay for it, because yours is not needed there!
Carriers were a great addition, but Frontier ruined them by making them so easy to get a hold of (a few days mining), and so easy to maintain in the long run (a few days mining). They should have been squadron assets like they were originally intended to be, 50 billion minimum outlay, 100 million a week running costs.
All they are now are the Anaconda Mk2. A plague to the game.