Charming.
Fine, put it in year 8. Right now there are so many other fundamental items that should be addressed, rather than multiple rulesets which will have a massive impact to ongoing development.
And that makes Open the equivalent of a "PvP" area, either explicitly on the load screen or implicitly by not being "PvE". Most new players will back away from the "PvP" option and end up in PvE world without knowing the details.
Players can be very creative around finding ways to circumvent rules, and the more complex the rules the easier it is to find loopholes.
How about a player hogging a large pad when another player wants to dock because they have a time-sensitive mission? That's causing them harm.
How about a player kill-stealing from another player?
How about a player blocking access to a station through low-speed collisions, or a group of them blocking a player from leaving a station exit the same way until their timer runs out and the station kills them?
How about a player pushing you in to the side of the docking system?
How about a player sitting behind another player and boosting in to them, increasing their speed past the limit and causing the station to kill them?
How about a player who cargo scans you when you're carrying illegal goods?
How about a player who shoots your limpets, or steals your mining fragments?
How about a player who pushes your SRV over a cliff?
This is just a few that spring to mind as I'm typing. The points is that FD have already spent years working through these situations, often slowly, to come to some kind of resolution. PvE will require a re-evaluation of all of these, along with code changes to implement them, and it would be complex and messy.
Kickstarter was a long time ago; time to give up quoting it. Otherwise I want my god-like powers.
these 'things currently exist in any mode...
here is a tip for you, have a read of one of the proposals earlier in this thread, which effectively stops griefers repeatedly ramming ships, ships firing on other ships repeatedly and even 'killing them' is possible, all at a cost...
some people (not all) would not like any PVP to be possible in such a mode... others would rather game mechanisms that respond in such a way to make PVP rather a lot more costly for the perpertrator and harder for them to achieve a 'kill' on another commander and also allowing the commander killed to not have to pay the rebuy insurance on their ship while kicking the offender out of PVE mode for a period of time (that period being floated being weeks or months)
the 'issues' you mention above are just unsociable people performing them IMHO, no big deal, they can be dealt with through a pilots licence system that when your points expire, you are unable to log into the PVE mode for a period of time... And as has been mentioned, player destruction by another player would see the player initiating the 'destruction' being banned from the mode for a period of time...
of course however it would be implemented would be up to frontier... Perhaps the 2.4? mystery update is going to be a mode for the PVE Community YAY

hehe who knows... again I would not like to spectulate on how long it would take to implement, but really, I don't think it would be that difficult as most of it is matchmaking instancing anyway...
Heck they could MAKE NO CHANGES... They could implement a PVE mode using a TOS, which when you log into that mode you agree to and in that circumstance, if you kill or whatever another commander and get reported and hey have video footage of it and FD confirm through telemetry etc then you might find yourself banned from that mode of play as it would be breach of their explicit rules for example not some private groups rules... now that would add some load onto FD support for sure, but would not require any significant implementation changes to the code base, just a new TOS