Somewhat tangentially related; Guild wars has had - I perceive - a tremendous impact on relationships between different guilds and players: Whereas previously people were quite happy to share their favourite teams, any cheeky little tips etc... we have now created a scenario where people are keeping their cards incredibly close to their chests.
The knock on effect is that it makes discussion impenetrable for newer players. The support they once received from the old guard has been withdrawn. People don't discuss team builds - in any meaningful way - other than to gripe against them. I think thats really, really sad.
One of the key things I initially appreciated about the GoW community was their willingness to help others grow and develop. We've quickly let that go, and I'm absolutely convinced that GW is responsible for that.