Neutrals' AIs??

[Suicide Junkie]

The main problem with Neutral is that they don't leave their home system. A tiny pool of resources dosen't get you far against a galaxy-spanning empire.

I played a "be a neutral empire" scenario once, and I survived because the enemy only arrived in ones and twos.
Eventually my star went nova, and it was game over.

If I'd been attacked by a TDM race, I expect I would have been easily overrun.