Some research says that lurkers make up over 90% of online groups. I suspect that Less Wrong has an even higher percentage of lurkers than other online communities.
Please post a comment in this thread saying "Hi." You can say more if you want, but just posting "Hi" is good for a guaranteed free point of karma.
Also see the introduction thread.
I missed the memo: What is the MoR hate blog?
ETA: Sorry, I finally realized that "MoR" must mean "Methods of Rationality", and a little googling turned up
http://methodsofrationalitysucks.blogspot.com/
I suppose that that's what you were referring to.
Yup.