Well, a blood dragon, rogue, or specific pirate should not pirate outside his space. also, many pirates are there not to pirate but to destabilize certain house, or as a way of complaint against certain house. So it would not make sense to see, say, a GC on Rheinland, as they want to take Ku government down and they don't care about RH.
So, if you are from a specific "unlawful" faction, restrict your actions to the faction you have selected. Else, you can use a generic Pirate ID.
(If you find any mistake in my English, please let me know via a PM)
(Really, I speak terrible English, so please, tell me if I make mistakes. I'd like to improve it a bit )