First ... read up more on Bounty Hunters ... their infocard explicitly forbids them from operating on the wrong side of the law. Bounty Hunters are lawful ... they are NOT on the fence. You are thinking of Mercenaries. Bounty Hunters are FORBIDDEN to work for unlawfuls. Bounty Hunters are lawful ... they are not neutral and thus not in the gray area.
Second ... you cannot have SOME Bounty Hunters friendly with Junkers and others hostile. This creates chaos and becomes abusive.
Third ... NPCs cannot hire PC bounty hunters ... period. Lets please keep these separate. The bounty hunter I'm referring to claimed the NPC Junkers hired him. In fact ... I had pirated his trade vessel earlier and he came back in his bounty hunter battle cruiser to take revenge.
Fourth ... Bounty Hunters are an abusive PVP whoring group as a whole. You wanna get them in line ... please do ... I'd like to see the Bounty Hunter ID limit them to gunboats.
Fifth ... I don't care if bounty hunters are in Sigma 13 ... that's fine ... just don't park near Yanagi. When I take my pirate into a house system ... I stay at LEAST 5k away from any planet or base.
Sixth ... lets not be hypocrites here ... I hate this do as I say not as I do bit. We are either all following the same rules or the rules mean nothing. You cannot operate on one set of rules for good guys and a completely different set for bad guys.
Once again ... bounty hunters CANNOT participate in ANY unlawful act ... this includes accepting bounties from unlawfuls.