But it's equally correct to flip that argument on its head and ask why people are asking FD to spend development time to change the game instead of just accepting that PvP can happen and it's meant to happen in open play. There is absolutely nothing wrong with people going to group or solo to avoid it when they want to, and these modes have been clearly included for this purpose.
The crime update would have had to happen no matter what, as FD got some stuff like ramming wrong.
See part of the problem is, people seem to think PvP = shooting other players all the time.
PvP and combat are not synonymous. There are non combat based PvP elements in the game, which is being expanded in the politics update coming. 2 people competing over a winning faction for a system, both in solo - are still going head to head with each other. They are having a PvP fight - without guns.
Also, DB did describe ED as a co-op game in an interview, something which sticks in peoples minds. Wings (the way it was advertised) pushes this idea more, with splitting bounties and trade profits (all co op things) - so it does lead people away from the idea of players shooting each other.
The other part of the problem, is FD should define what "griefing" is - right now, there are so many versions and so much overlap, it has to be causing problems. Like you have said, how many people report a "griefer" who is just a normal player pirate, or report someone for just interdicting them?
That must be a huge nightmare, to go through logs constantly trying to figure out who is griefing, without an actual definition of griefing.
So a good first step to solving griefing - would be to define the term properly