I have a problem with mercenaries having a trade wing, actually. You're one or the other.
Let me put it this way... Let us say that you are hired by the KNF to war against the BAF. Are the BAF allowed to shoot your traders to death now? By the rules, no.
Let's say, for example, that you're at war with the Outcasts. Should they now rob your transports or blow them up, since you're at war?
Or, for instance, there are some organisations that simply don't trust mercenaries, and jhave a 'zero tolerance' policy. Should they blow up your transports, since you're essentially mercenaries in the wrong ships?