As for affecting the game; as said before I'd love to see "Open-PvP" made into a separate galaxy. The salt when it filled with tumbleweed would be epic.
This is another misconception. First, each platform has an organised PvP community/discord/systems where PvPers meet up and shoot each other, arrange tournaments, events, tours etc so a way out for such has been found.
Salt in PvP "world" is mostly driven by the eternal conflict between "lawfuls" and "criminals" and various mixes of such.
Last, but not least, I have experienced quite a good number of wars/conflicts/broken treaties between PvE players/factions and can witness the salt has been epic as well.
As an example of what could be, look at my last 5 player encounters: one was a Duval pledged = enemy T9 flying in Delaine space and so I've shot the ship down, another was a Delaine pledged and free to roam in our space, two others low rank DBX/ASP unpledged and no squadron (I did say o7 they never replied), last one was docked in an outpost (Antal pledged belonging to an enemy squadron) but I was in my hauling Python so went back to a nearby system to pick up a kill boat, came back to hunt him... but no luck. So far so good, isn't?