A tricky solution. Just imagine those guys would have placed a bounty on OP for fun. What would you propose to counter this?
What if he does not have a bounty? E.g. anarchy system?
1. No bounty unless subject to a killing? Then an option to place a bounty appears post death when you respawn? - multiple kills by the same player all add up.
2. If it happened in Anarchy then that's essentially what that system is? Pilots should be wary of flying through Anarchy especially in ill prepared ships.