While the obscene amount of armor on stations and whatnot would make actually destroying the thing take either days, heavy capital ships, or nuclear warheads, I wouldn't be averse to giving docking rings and stations something like what tradelanes have. Shield bar that disables docking until it comes back up. Best part is that like tradelanes, lawfuls can shoot out their own stuff to simulate ordering the workers to institute a lockdown without the whole place going blood red.
My concern is that it may be either annoying or difficult to mod this so that the server doesn't lock up when people undock from a ring that's been knocked out. Doable, certainly, but it could require fixing undock points on every single station...