Not only do they spawn in the same system, worse is that they spawn on Baltimore whereupon they immediately "cleanse" any cops loitering around Fort Bush, whom were otherwise merrily munching away at some jammy doughnuts without a care in the world because that carrier is a friendly craft. So they thought.
A legitimate tactic is the jump drive, I agree, but I can foresee problems with groups of battleships doing this over and over and over and over again. Seriously, this went on all morning with just one carrier. Previously we could pin them down with bombers and eventually destroy them, but now there is no chance because as soon as their nanobots are used, they initiate a jump and their hull will hold out until the cycle is complete because they have a ridiculous amount of armour, unless there is a sizeable opposing fleet, which is not always practical when there are only 70 active people throughout the stars.
I feel that there are two options here; a) restrict the time between separate jumps just like how we can't reuse a hole/gate for 30 seconds (even a half-hour would help) or b) implement a tackling method, possibly by use of a FLHook command to be used only by select ships (maybe bombers).