I understand the RP rules like this (and i hope i got `em right):
Cop:
Fines Pirate, Merc, Freelancer engaged in illegal activities. Kills only if fine isn`t paid.
May kill pirate on sight.
May defend Freelancer or Merc attacked by pirates.
Pirate:
Taxes Cop, Merc, Freelancer. Kills only if tax isn`t paid.
May kill cops on sight.
Merc:
Gets hired by cop or goes after bounty set by a cop = Cop for duration of contract.
Gets hired by pirate or goes after bounty set by a pirate = Pirate for duration of contract.
If i`m wrong, smack me with DA BIG HAMMA!