As Hobgl said, LNS aren't under control of =LSF=, [LN] or LPI-, except in some special cases where the indies start to do some weird stuff like attacking our allies.
Also, What was this destroyer of yours doing in Liberty? They are illegal there (in RP). Thus justifying why the LNS stopped you, though maybe not justifying the lack of RP you're trying to bring forth.
If there really is a lack of RP according to you, and thus a violation of the server rules please fill a sanction report.
We've been totalitarian with our indies once. People started to complain about a certain lack of liberties. Now they have quite a lot of fresh air. Suffice to say, LSF will not intervene in LNS business unless necessary (to avoid forming new enemies, to avoid unbalanced fights, etc)