When the Harvester Drone first showed up months ago, I talked to ScornStar about an idea I had for my mad scientist, Xavier Hackworth. He uses a cybernetic implant (a personal and unique design) to neurally link with computer systems and ships to control them. His main force would be drones of various sorts. Scorn was open to the idea of a limited number of non-Harvesters being allowed to use it. Of course, ScornStar no longer leads the Toasters.
I wouldn't really understand most non-AI using an AI ship, except in certain RP'd circumstances (such as i'd do with Xavier, if I ever got around to it). At the moment I think it's against the rules for anyone but AI-ID'd characters to use either of the ships without Special RP permission. As far as non-Harvester AI using the ships... Well, I can see why the Harvesters would be generally against that, but since the ships were not, in the end, given to the Harvesters, I don't see how to prevent it. Anyone, even an AI, flying such a unique ship should have a reason to have it. It's not something for all AI, it's something for some AI.