In relation to interdictor ships.
They are ships that whack up a 'field' that disrupts all cruise. Used extensively in Star Wars for traps and to guard places.
We had some issues with this type of ship in a Star Wars mod I was involved in.
Essentially it worked by launched a wide range (10k or something) CD constantly, or every 5 seconds or so. It would blow up even without a target to hit and so disrupt cruise even if the ship is on it's own. (No one to hit with the cd to take others out of cruise)
They were especially needed since cruise in this mod was essentially a form of Hyperspace jump, just called micro jumps. Speeds of thousands, so you got to the centre of a system in less than 10 seconds. Charge up time was long enough though.
Basically - Can be done, has been done. Has issues however, NPCs will go insane and it doesn't work 100% of the time (Though that was mainly due to player stupidity in using it)