I'm no expert on bounties, or bounty hunters (unless watching Dog makes one an "expert"). But, I believe that in most states, legal bounty hunting is allowed by obtaining a bounty license, obtaining a copy of the bail contract, and a legal and non-lethal way of detaining the "bounty".
In the instance of the Back Pather bounty, I don't believe that it was done in a legal manner, and it possibly was an infringement of civil rights and due process of the law. But, the NBP doesn't seem to have minded about applying proper legal channels to locate Zimmerman. Chanting "no justice, no peace" and suggesting bloodshed in nuanced ways does not make for a legal bounty procedure.
Please share your opinion on the bounty, as well as your opinion on why Zimmerman is currently not employed. I'd like to know where you stand on the issue, not just your conjecture and ad hominem commentary on Zimmerman's website (if it is indeed his own site).