Well since I've only been on the receiving end of griefing (or rather griefing attempts, as I usually evade them or place griefers on my block list) I can't really say what types of reactions griefers typically elicit from their victims. It would not surprise me in the slightest to see a lot of immature reactions on both sides. I will however note that well over 90% of the "PVP" interactions in Open are griefing/trolling behavior and that does tend to frustrate players when it is the only interactions they routinely see.
I should also point out that the Mobius/PG community is not entirely blameless either. The use of terms such as "consensual PVP" to attempt to criticize legitimate PVP in Open (which, by definition, you "consented" to by being in Open in the first place) and the push for an "Open PVE" mode (which by definition is no longer "Open" if it only involves PVE) have tended to polarize the discussion between the PVE/PVP sides. Essentially certain players want a "safe space" where they can interact with other players but have a 100% guarantee of zero risk to themselves from other players which is not actually a game any longer, it's more of a chat lobby with space ships.
I can sort of see both sides of the issue as I'm a PVE player who has played exclusively in Open so I can understand both arguments. I don't engage in griefing behavior (and rarely engage in PVP at all) but I have learned how to deal with it effectively. I just consider it the cost of "admission" to the positive interactions with other CMDRs in Open and I'm willing to pay that "price" so I can interact with other players. I also think that, to a certain extent, this has made me a better player as I have become better at more sophisticated escape/evasion techniques as a result
The problem is the term 'griefing' gets overly applied to every single 'nonconsensual' (ugh) PvP interaction.
Engage in piracy?
Youre a griefer.
Kill a player to collect their bounty?
Murdering troll.
Shoot someone at a CZ pledged to the other side?
You only selected that side to gweef your 'victim' (ugh)
Kill a player pledged to a Powerplay Faction that rivals yours?
Youre exploiting powerplay to grief innocent people
Sensibly show up looking for a fight with backup wingmates?
Amoral ganker
Play the BGS or UA bomb to shut a CG down?
Real life terrorist.
People need to accept in a multiplayer environment where confrontation can not only occur, but is encouraged to by its world and associated mechanics, that your opponent is more than likely not griefing you.