My previous post wasn't clear enough. People are struggling to understand my position that issues of PvP and griefing/bullying are entirely separate. My bad; let's try again.
One of the points I made was that in any discussion about PvP gameplay, there is invariably an interjection with talk of griefing or bullying. However, these are quite distinct topics.
I will use the terms bullying or harassment as they are much better than griefing which is fast becoming my most hated word in that nobody can agree on what it is.
Bullying comes in the forms of verbal (voice chat), written (text chat) and game actions (killing, spoiling). Game actions could be considered the equivalent of real life physical bullying. I think we can agree that therefore bullying is not simply an extension of PvP, but that PvP can be leveraged in the act of bullying.
Whenever bullying gets brought up in a discussion about how PvP gameplay should be implemented the waters are muddied. People should not be asking "What can be done to PvP to prevent/reduce bullying?" They should be asking "What can be done to prevent/reduce bullying in game?" If we just think about preventing bullying in terms of hobbling different game aspects then we end up with a blunted experience and a poor solution. Instead we should be talking about how we can identify bullying behaviour and prevent it across the entire game; a different conversation entirely.
Previously there were calls on the Elite: Dangerous forums for a separate PvE group system. If we are charitable and assume people wanted this because they didn't like bullying behaviour then they are misguided because it would not come close to preventing it. There would still be huge scope for other types of bullying and even other game actions which could spoil the experience for other players. It may placate those people with a bizarre like for NPC combat but not human combat, however ;)
I searched for the terms "bullying" and "harassment" in thread titles on the forums and, surprisingly, turned up no results. If people are genuinely concerned about in game bullying then I implore them to start specific threads and engage with the developers that way. It should be a lot more productive and you are far more likely to get answers to your questions.