What you described could very well just be classified under "Basic Human behavior under effects of anonymity."

when people have no real fear of repercussions, they act a way in which they might not normally act in the real world.

This has been a problem since Day1, Of basically any MMO ever created, or anything ever created where large groups of people interact with Anonymity.

I really hate it, But I don't think its FFXI Centric, So I'm not entire too worried. unfortunately you just can't force everyone to be nice