And the current police factions? Those are just lacking the indies, because they are boring compared to military ID's in the houses, and I am telling you this as a member of RFP|. It would only lead to almost all people joining the navy factions while the police units starve.
Therefore going for 2 ID's will not solve the problem for factions that lack the indie player base, but will only benefit the official navy factions, by increasing their applications. And in 2 months we are at the same point again. Or will the admins at one point tell the players: Nope, no more people in [LN], join RFP or KSP instead! (just as an example for you).
Do you know what will happen then? People who recently joined this server will just feel patronized and then leave this server for another one where they can play as they like.
So, instead of restrictions to the indies, we have to increase the popularity of the unpopular factions again.