That's the problem spot on- the AI s were included as a gimmicky faction - there could have ben a Space-Ape-ID , too someone decided for robots though.
When it comes to roleplay - if you want to do it(which i strongly recommend) you will ahve to think on what is logic ?
Assaulting Corsairs while your homeplanet is pinched in between Corsair bases in Lambda, Delta and Gamma? Really? Stirring up the wrath of a big player in the Omicrons might not be the wisest move for a tiny inRP faction that has a -clearly- localized homebase.
That said, of course you can pick pirates- i mean your AI could have done "research" on how traders function and sees a trader as a fuctional logic unit that brings stuff from A to B , now here comes the bug into the program, stopping the trader and trying to destroy teh logic chain of getting stuff from A to B by taking stuff making the move from A to B irrelevant and unlogic.
Stuff along these lines...still originally the AI were intended as 95% rp 5% pewpew faction so if you do the research and exploring hing you might find awfully little time to shoot around in your cruiser, which seems liek the thing you prefer?
Just please don't use the "can hunt pirates phrase" to actually do it, that is what makes AI a headache to everyone