People who dislike open pvp are why most MMORPG's these days are carebear funfests of total safezones and little to no pvp which you usually have to flag for.
What you consider a "griefing fucktard" we consider part of the game. If the game allows us to kill someone, guess what, we may make use of that ability. This is why I do not play WoW. I did for a while, but not being able to kill people in my same "faction" was a deal breaker. If someone was annoying you, what could you do? /ignore their username? What if they physically followed you around? It's a perpetual world so you couldn't just change instances (unless you went into an actual dungeon/raid without the person). So THEY could theoretically grief you. Sure, you can report them and maybe, maybe, a GM might give them a warning or whatever. Seriously though, the ability to kill anyone, anywhere, for any reason, is what attracts a lot of us to MMORPG's.
There are a few games that cater to this. Eve Online isn't half bad and Darkfall is decent. I personally loved UO and Shadowbane simply for the open pvp. I loved Shadowbane for it's player politically run servers. There was no real PvE content, you killed mobs en mass to level and you pvp till you were exhausted. The servers were ran by players, we decided who controlled what territory, who had rights to what resources. We chose our own paths in the game.
Then you log into game's like WoW where you can only fight persons X, Y, and Z and only in locations A, B, or C. It's so carebear it might as well be Hello Kitty Online with Orcs and Humans. We rofl at people who QQ over being killed in pvp. It's hilarious to watch people break down in a nerdrage of delicious tears over precious pixels they might lose on a digital screen. You would be shocked at grown men weeping over binary 1's and 0's which compose their +5 Sword Mastery gloves they suddenly dropped because they weren't keeping an eye on their surroundings and got wtfganked.
Yes, casual gamers and non-pvp fans make up the majority of mmo games. Sad as it may be. But there IS a market for these games. Darkfall, Mortal Online, Fallen Earth, Neocron, Shadowbane, UO, Eve Online, and more and more and more. There ARE games for the die hardcore pvpers.
As Shadowbane taught us, play to crush. If your ego can't check being killed, you need to go install Runescape or MS Hearts.