I think people above me are forgeting, that the lolwut aspect of the game, aka the people, shows the npc faction.
If they are pirating in 3 cap 8 gunboats, it's their problem, as they simply do not know the rogue Rp well enough.
Back on the matter on hand, in theory the LR would assist the lawfuls on attacking the RNC battleships, because, not only rogues need Hfuel, which they can salvage once they have taken down those boats, but it should be of interest to protect liberty territory from outsiders, much like the xenos would, but, in this case, it is because, that while the rogues could work with the liberty government undercover sometimes, they would doubth they would be able to do so with Rheinland.