It's come up a few times, but let's get down to the real issue: instancing does not help build gaming communities. I just had a bit of a run in with another player in Animal Crossing: City Folk. What's normally a relaxing game can get a bit depressing should a problematic player enter your town. Retribution? You kick them from your town and ban them. However, since AC:CF uses real world time, progress that may take a few days can be ruined in a matter of moments, similar to EVE. However, AC:CF is completely instanced. I cannot simply go to his town and return the favor, and it may take awhile to find someone who knows him well enough to do it for me. The best thing I can do is post his name on the forums I met him in and pray he doesn't have too many more contacts.
And then, it hit me: it's the same thing in WoW. A player comes in, ruins things for other people, and can simply walk away. Without a persistant environment, and one in which the game allows nearly anyone into your party, you run the risk of having to deal with the lamer again, or face timers in order to avoid him. In Darkfall, you do have the option of ganking someone to high-holy-hell, but because there's no instances to hide in, no alts to switch to (without having to buy another account), and a single game world, lame players' reputations spread pretty quick. While soloing is sort of viable, the main issue is that other players (in groups usually) hunt the best spots, especially for people not in groups. A pariah has to have a very high level of determination in order to survive in Darkfall, while in WoW, the game will continue to hold his hand and force him onto other players who may be completely unaware of his actions.
I question this motive. I understand that people want to play the game, but instant gratification doesn't seem worth it to me. I've made more contacts running world pvp events in WoW than I have in instances... even in Vanilla WoW. While I still keep in contact with some people from my raiding days, I don't play with any of them, sadly. I've never even gamed with them outside of WoW. My world pvp friends, on the other hand, are people I've jumped MMOs with, switched console info with, etc. While one may feel like raiding can build the "soldiers in the trenches" connection, the problem is what happens when, to use a cliche, "the war is over." When the instance ends, and you need to do something else, is that person still someone you do things with long term?