playing snake type maps, where each wormhole leads to only one path, it seems impossible not to destroy AI's command centres since leaving them alone would have them magically churn out units! theres not even an AI EYE or some special guard post or warpgates around there.
so the only way to stop this is to destroy the command centre, but since this is a snake type map, (with only one wormhole on each planet) it is quite bad since it forces me to increase the AI's progress without much choice. Leaving it alone will sure attack my previous captured planets before it.