I'm kinda curious; I started a map, and right on the first or second world I attacked I found a few hostile zombie ships. I don't remembering seeing anything that I know can create them --- mainly triangle ships and then a few sentinel frigates, snipers, and teleport stations --- so is there any way the AI could be producing them in his territory? Actually, now I think of it, I can't think of anything that makes zombies besides botnet golems, so I think most likely I'm forgetting. I was up against some pretty basic AIs, Starfleet Commander and Vanilla, with golems and spirecraft on medium, so it oughtn't to have been from those.