...and i dont know how it worked...
I was screwing around spamming colony ships via Ctrl-C cheat and found this out. I had always assumed that they wouldnt "work" on a planet unless i loaded them up with civilians. For some reason i forgot to fill one ship up with them and tried to colonize a planet... It worked, and i had a planet with 0-population under my posession... I never tried to go any further than that, going for a couple of turns to see what would happen, but i was obviously shoocked that such a thing were possible to begin with...
So... anyone else do this before?