Wolfshead writes in an excellent post:
Most MMO enthusiasts have noticed a sharp decline in the quality of the WoW community of late. Cursing, nastiness, bullying and other forms of rudeness have now become endemic in Azeroth.I can imagine at least one prominent blogger arguing that "no, the community hasn't changed, it's just your nostalgic recollection of the past".
Here's a challenge then: how would one measure the quality of community? I'm suggesting quantitative statistics, not gut feel opinions. Do that on a monthly basis, and continue to do that year on year. Get some objective data.