Is there any way to remove colonization ships that belong to other civs without waging war? I mean, say I'm in a galaxy with 3 other civs, and i have a quarter of the galaxy under my influence. However, I don't generally colonise all planets in a system, just the higher PQ ones. So, after i've gotton a fair amount of influence in the galaxy, another civ's colonization ship comes and tries to colonize a lower-PQ planet deep in the heart of my empire. Needless to say, im not too happy about this, however, the only way i can find to stop them from disrupting my beautiful orb of influence is by destroying the colony ship, which is regarded as an act of war. This, also, i'm not too happy about. Is there any way to stop the AI from doing this without openly declaring war on them?
A Pre-emptive thanks for any answers.