The 'problem' if you could call it that is not just with the Liberty Navy, but also with in the Outcast/Liberty Rogues/Lane Hackers/Indie Pirates.
If you're prancing around NY in your Gunboat shooting anything that moves and pirating traders willy nilly EXPECT THE LIBERTY NAVY TO RESPOND
And I say this as a person who is a fanatic Liberty Rogue. Pirates should not be making a fuss and attracting lawful attention, you should be hiding in the shadows, pouncing on traders, then slinking back into the darkness before the Police catch a wiff of your scent.
It is fully with in the Roleplay of the Liberty Navy to kill you off. Fairplay it is not, but then how is 6 unlawful Gunboats and a Barghest vs 1 fighter fair either?