That is argument for PVP toggle. Its not for Open PVE mode.
Lol no. Have you heard about private group mode? That would be the same. Separate instancing.
Unfortunately EDs modes are not separate and an open-PvE mode, how envisioned by many, is not possible without probably a substantial rewrite.
Remember Solo is just a block everybody blocklist, PG is more akin to whitelists, block everybody beside the ones with the same tag. PG rules are enforced by an honor system and there is nothing in the PG settings to prevent adverse actions until a member is booted from the pg. There are no mechanics in the game to prevent adverse player actions beside FDev or player-made blocklists. They all would need to be written, tested, and implemented. 1min into the first beta the first exploits will be found and the fun begins.
It will be interesting to see with ED 2 if a PVE Open server option is made available like it is on so many other multiplayer games.
I don't think ED or any successor will ever have an open PvE option so long the galaxy is shared. FDev said already that they will not implement an open PvE mode for ED because it would be to much to administrate.
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I do not understand the whole mobius argument. On one side it's put as a shining beacon that most players want an open PvE server and on the other hand people are complaining that they don't see anybody in the PG and want an open-PvE because of it. So which one is it, it can't be both? So either many people sign up just for being there but actually don't use it or it's not that many to begin with. Maybe it could also be that the galaxy is huge and running into somebody else is very unlikely, excluding the known hotspots. This is true for open too.
As I wrote before I put some blame for a noob getting blown up at farseers on the get-stuff-fast guide writers. They are knowledgeable enough to tell the noob to go in solo/pg or prepare for adverse game-play then following the guide. If they still do it in open and get blown up, it's the choice they made. Learn and adopt, be it by gitting gut or switching to another mode.
My personal opinion is that the modes are fine as is, Solo for the people who just want to play alone, PG for group play, and open for everything-allowed-by-the-tos-goes. Maybe a few more settings for PGs would be nice, like automatically boot players who didn't log in for a certain time or hours. In short some better management options. That's what I'm guessing as I never really played in PG as I just never saw the purpose of it. All the things I can do there I can do in open too.