You don not HAVE to follow the orders of official LN players, but there will also be inRP consequences of doing so, like already stated, LN can request your ship become hostile to Liberty Navy, or they will order you killed on sight.
Now...given that situation...I'd probably make an inRP communication to the Liberty Navy Command asking why one of their own was being all chummy with a Lane Hacker, and then refusing to come to your assistance. I wouldn't expect much of a response....but who knows? Some interesting RP could develop because of it.
