I'm 100% behind the idea of an in-game mechanism for players to be able to pledge-to/be-employed-by Factions (that's any Faction, whether existing or player named). No problem there. In fact I'd very much like that to be developed with appropriate HUD display, missions, messages, transactions, etc. somewhat akin to Powerplay but on a more local scale. If necessary provide suitable gating around time/effort with restrictions on chopping and changing allegiance too often.
But, having third-party individuals (however nice those people may be

) decide who can or cannot sign up with particular Factions within the game world is the point I'm opposed to. Make a system that works equally well for everyone playing the game, with rules set by FD.
I'm not trying to rain on anyone's parade

it's just that I can see this as a way to develop the game for everyone rather than just adding third-party controlled clan-tags for a few.