A Bounty Hunter's or Merc's role play is that they hunt people for money and do it efficiently.
That means any chatting between them and their targets is kept to a minimum in order to collect the kill without problems and move on.
That means they won't be chatting you up much and will likely approach you, tell you why they are about to blow you up, then blow you up. In the past they might offer you a way to avoid the death by bribing them. Those days however ended when someone sanctioned two mercenaries over word play.
This is a role play server. The Hunters and Mercs are role playing their part. The problem? Most of their targets don't like being blown up so they cry that the Hunters/Mercs aren't role playing.
There are many ways to keep Hunters/Mercs off your back. Hire them yourself. Pay another Merc/Hunter to kill the ones that bother you. Don't be stupid and stumble into areas you know they frequent. Report them to the authorities (if you are lawful and they are not) if they are breaking the law so that the law can also send its guns after them.
Instead of doing any of the above, you come here and cry. Such is our way of life no?