The intent to limit lulwutting and killing every unlawful is rendered moot by using a Bounty Hunter IFF. So, yeah. What is the point in this line again?
I understand the concern, but that doesn't justify limiting this ID that bad. It's a major turn-off, and I doubt anyone would use the ID who wants to make a proper Vigilante.
Bunters do it for the money, while Vigilante's might have individual reasons, which is an RP thing and should be up to the players roleplay.