"The last part of odd group dynamics comes from how much our genre has grown since the days of EverQuest and Final Fantasy XI. Back in the days pre-Warcraft, the MMO community was a small group of gamers who, for the most part, had the same play styles. If you didn't like the genre, you probably didn't play the games. The games presented their basic dynamics to the player very quickly, and people who didn't like how the game was going had the chance to drop out at level 10 or earlier.
That's not how the community is today. Thanks to the rampant success of Warcraft, friends are inviting non-MMO friends. People who haven't even touched a game before Warcraft are picking up MMOs. They jump in, do their soloing, fall in love with those dynamics instead of being immediately introduced to party dynamics, and then enter into parties with explosive consequences."