Hah, yesterday I interdicted this commander in a Hauler, demanded that he'd dropped crago or that i would end him. He didn't want to drop cargo so i killed him. I get into super cruise and there he is again, in a hauler, I repeat the process, and kill him again. Enter super cruise for the second time, and I see the same dude, in a hauler... Guy disconnected three times, I interdicted and killed him three times. He probably switched to solo play after that. Hah, what a jerk. I must of rustled his jimmies good.
I'm guessing your post is a joke. However it illustrates nicely why this exploit may not be stopped. The Open game mechanic does not promote non-consensual PvP (even if the non-consensual bit comes in at the end of the fight). Yes, pirating is allowed but FD always said it would not be easy (or fair?).
Mechanic may not change as Private Group is the place for real PvP with rules for battle arenas, rematch, leaderboards etc, all decided, run and enforced by the particular group. (see the groups forum for more info)
Comments that Open is for PvP only, or implies consensual PvP, are plainly wrong (along the lines of:"You've submitted to my interdiction so now you've agreed to fight me to the death").
There will certainly be some (increasingly rare) opportunity for random PvP in Open, but players (both attacker and defender) may 'cheat' so there are risks to our gameplay satisfaction if we look for PvP fair play in Open.
Calls for Open to be a default PvP group mode do not take into account the size, no rules, sandbox design of Open. It is a very unsatisfactory arena for PvP (except for scripted events such as combat zones and capital ships) and unlikely to provide good PvP gameplay. In any case Private Groups provide the rules based PvP option so no need for Open to duplicate that.
'cheating' is, of course in the eye of the beholder. FD have stated categorically they will deal with cheats, so report any behaviour you feel is cheating (or even unfair) and if FD agrees with you it will be dealt with.