Okay, I hope the developers are still looking at this.
About the murdering, I propose a form of consent.
A player wishes to do some PVP, but not in a CZ out in open space.
If he just attacks another commander he receives the harshest penalty. His funds are automatically reduced half the rebuy cost of the commanders whose ship he just destroyed, this money is immediately applied to the aggrieved commanders re-buy cost and may not be a cash balance applied to his credits. The offending Commander is also fined the value of the ship he destroyed as a Galactic fine for that faction and a class difference rating is applied. An Asp that takes out an Eagle would have a combat factor of 4 which would equate to four times the insurance rebuy cost is the system fine. The inverse of the combat factor is an eagle that takes on an Asp gets a -4 combat rating and there would be no system fine, just the Galactic one for loss of control.
How does consent factor in.
So you are out and just need to kill something, little brother ate your pizza, old lady put you in the dog house, you are just demented.. whatever. You see a ship, hail him, "Prepare yourself you are going to die!!!!" The ship replies, "such fecal matter through a straw". It is on, no fine. But if the other commander does not respond and you attack all penalties apply. If he wins, he gets no fines but a bounty worth the difference in combat ratings as described above, you pay your insurance, sucks to be you.
You are flying along and someone attacks you. You fight them off and destroy them, no fine, bounty as described.
Furthermore, a commander cannot pay off his bounty for twenty four hours and is hostile in that and surrounding systems. Galnet will put out an All Players Bulletin advising of the wanted players location, unless he moves only in anarchy space or into a non-aligned major power. If you are wanted by the Feds, the Alliance and Empire like you, sort of....