Well yea but if they are given the command to mine i am 90% sure they do not defend them self. But if you give them the follow you command, they will shoot on ships that shoot on you, even if its one of you own ship that shoot you. I don't know how they start the fight might be a shot by accedient, don't know if they bump one will count as an attack. But giving them a new command will stop the fight, Unless a new bug happens ::)