Because, if you are simulating space, there aren't any walled-off arenas. It *should* be a functional crime and punishment system, driven by system security levels and faction states, that penalises antisocial behaviour - rather than any 'artificial' boundaries.
Of course, that's easier typed into a forum post, than implemented in game, it seems...
Agreed! We're four years in, and by now why don't we have:-
1) Illegal destruction (yes, even in no populated systems needlessly/incorrectly defaulting to "anarchy") resulting in increased notoriety which should allow a couple of illegal destruction over a given period before then ramping up significant penalties such as stations & entire systems denying access. A Pilots Federation bounty making the CMDR a legal target to all other CMDRs, and if notoriety is high enough, the CMDR is highlighted to all other CMDRs as a know psycho. Notoriety should take days/weeks to decay.
2) The game orchestrating easy to access, meaningful PvP gameplay (eg: Via Powerplay, OPEN only CGs, or the game orchestrating labeled/clear PvP Hotspots in OPEN via the BGS etc.
Done! Penalise the unwanted PvP. Promote the wanted PvP.
At the moment we have clunky C&P mechanics ontop of shallow PvP gameplay which players are simply trying to still make the best of after FOUR years....