Hiding of them is entirely lame. Screaming about how you work really hard to hide all 6, and then log out for hours, and come back to find them in use or sunk is also lame. Saying work on your lowering your rank (by doing more silly things that don't make the game much fun) is also lame.
I'm venturing the guess that since HT put CVs in the game, and made them capable of launching vehicles, PT boats, and aircraft, that he was probably thinking they'd be used like roving airfields, and not family heirlooms.
FWIW, I like Slap's and GF's ideas. I tend toward the autorespawn of the CV, but nailing down a good practical time limit might be tough. Hmmm, actually, why not the same respawn time for a sunk CV? Also, staying at the helm for the duration of your control might also be a good fix. Sure, it'd stink for the 150mi sail to foreign ports, but that would, I think, tend to tempt the 'captain' to keep the CV in use, for fear of passing out from boredom. It might also promote AFK captains, but there's always someone with lower rank on.
Cheers,
hub