My PCs love ships. LOVE them, for one big reason: They like to hop into ships and shoot everything, mainly NPCs. Let me set the scene:
A ship is docked next to an old temple, stormtroopers are loading equipment onto the ship and PC's goal is to stop them for obtaining the equipment and investigate the temple. Of course, they want to steal the shuttle and shoot all the poor troopers with the guns. This is basically the standard operating procedure of my PCs. There's a NPC threat, they look for the nearest ship to hop in it and rain the pain onto NPCs. They've wiped out squads of minions, rival bounty hunters, etc.
I got wise to their game, and in the instance above, i had them trying to splice the computer via a Nemesis opposed roll and leveraged dark side points to keep them from using the ship too much. It ended up being the hardest session in 10-session campaign so far. The PCs got their a***s handed to them by the assassin droid who owned the ship.
How do you deal with PCs stealing ships? And, more importantly, how do you nerf the strategy of hopping in any available ship and taking out the planned opposition without being too heavy handed?