Right, um, the pirates are supposed to beat the living hell out of the LR, LH, Xenos, etc. If they didn't, then the revolutionaries would "win". Also, capital ship battles, while awesome, should NOT be happening on a regular basis outside of "warzone" systems- that would be Dundee, Tau-31, and Omicron Eta. Liberty's home systems are not warzones, they are house systems, and as such a pirate capital ship should be big business, plastered all over the news.
Oh yeah, since all the existing player factions in Liberty or remotely connected to it are trying to reduce capspam, you really don't want to be encouraging it. Plus, if an Outcast Destroyer (let alone a battleship) is seen anywhere near a heavily defended place, the 101st will have your head for needlessly damaging Outcast ships.
Fighter battles are more fun than battleship vs fighter massacres. Since the factions fly fighters almost exclusively and are trying to promote the indies to fly fighters too (fighters should outnumber caps, if you don't agree I have no respect for you) everyone has a more enjoyable time if the majority of engagements are fighter vs fighter. As for getting capital vs capital, schedule encounters with Liberty's lawfuls. Don't just tankity-tank in, that will swarm the indy BCs and make life a living hell for the pirates. Please.
Oh yeah, faction or not, if someone is accepted as RPing the leader of an NPC faction and they give you, RPing as a member of that faction, an order, you follow it. An independent organization that scoffs at the orders of their "allies" is not only impractical in RP but will also get you KoS'd by everyone. Unless your RP is stellar and you RP being exiled and as a separate force in a way people like, you'll be screwed and have no fun.
Keep in mind this applies to all, factioned or otherwise. If someone RPing as part of the Northern Liberty Navy refuses an order from an indy Admiral of said Navy, its the same as a faction member refusing an order from their faction leader- bad.
Please, join the existing factions before continuing this, it will help a lot if you want to keep the idea.