The real problem with murder hobos is that the consequences when they die are less than the consequences for their victims. That is to say, the ganker gets his ship back with just a single click (and the rebuy is not a big deal to him). But his target might have lost cargo or even just time, and may not be able to afford the rebuy.
If you really want to control malicious PvP behavior, without outright banning it, then you need to simulate what stops it in real life - namely, actual mortality.
Specifically, keep open mode just as we have now, keep solo mode just as we have now. Keep player groups just as we have now. But add a "role playing" mode where, if you die, you can't come back (perhaps allow escape pods but only if you're not wanted).
You can play as a murder hobo if you want. That's fine. Role play as a psychopath if you want. But if (and when) someone finally dispenses justice on you, you would actually be dead - out of the role playing mode forever.
If you really want to control malicious PvP behavior, without outright banning it, then you need to simulate what stops it in real life - namely, actual mortality.
Specifically, keep open mode just as we have now, keep solo mode just as we have now. Keep player groups just as we have now. But add a "role playing" mode where, if you die, you can't come back (perhaps allow escape pods but only if you're not wanted).
You can play as a murder hobo if you want. That's fine. Role play as a psychopath if you want. But if (and when) someone finally dispenses justice on you, you would actually be dead - out of the role playing mode forever.