Seriously , all this discussion seems to reach a dead end. My humble opinion on this point is : there can not be an harrassment situation in this game , simply because the name and simulation model of this game is made so criminality is part of the deal without concession .
Let see the issues as stated : complaining against Player killers that don't stop chasing and destroying you for no reason and having so much ways to remain clean .
Well , on the other hand , PVP here has exactly the same issues than PVE : non spreading criminal state , easy criminal state cleaning via sidewinder suicide, underpowered police response to crime except nearby stations , and so on....
But this is known ! So stop complaining. I don't play in open if i don't want to be ganked. I go private or solo . If i go open , then i take and accept the risk of beeing under threat from other players and that's part of the deal , as in real life.
By the way , even NPC use harrasment ( have you ever beeing chased all your way long towards your destination by cheated teleporting npc pirate that can pop up everytime you go in normal space , just because they interdicted you once ? is that not harrassment as well ?)
FD made 3 modes , that's not for nothing. The system in place is criminal friendly due to apparent difficulties from in game authorities to enforce the law (that's not a critic , but a state , and seeing how hard it is for IRL cops to protect everyone , try to put this in a galaxy....). That's why it's Elite Dangerous.
Before that game , i've played EVE online , and there , you had no choice but PVP all the time. And even in high security system you could get ganked by pirate players swarms , or player killer knowing the tips and tricks to bypass security response.
In ED , you've got modes to protect you , except from NPC. Use them. Going in the open mode is taking into account you can meet bad cruel persons , who make fun of your distress. Well , it's life....
Perhaps FD may revamp the security system a bit , but don't make a fool of yourself :the joy of player killer , is to use every tricks he could find to harass others under the nose of security. And even if an ingame financial consequence is put in place , don't expect much. these people know how to raise funds fast to follow their plans.
And if you want to stick to open , form wings , be prepared , don't stay as a prey and use your fangs.