If a LN ship catches your train full of cardamine on the Bering - Texas lane in Bering... Guess what he's gonna do? He's going to turn you inside out.
Offshore waters boys and girls. Respective navies generally stick to their own sides of the system being the only real convention governing conduct for the lawboys in those systems. Otherwise it's not like some kind of magical NO LAWS NAVY GO AWAY NO LAWS U CANT STOP ME NO LAW FREEPORT NEUTRAL STOP STOP I REPORT U WTF land.
What, houses should just ignore threats to the extra-house shipping which serves as their economic lifeblood? We should ignore the NPC presence?
I guess, however, if you want to have some kind of magical logic defying saving grace to save your contraband smuggling self you could write the President of Liberty to Q_Q about his boys in blue breaking your drug ship like a bad habit.