I have several similar experiences, often myself being the one who asked most of the questions. When teaching I always try to encourage asking questions as much as possible. I am well known for the many questions I am asking in class - even to the extend that others get quite annoyed by me.
But if i did not listen to the teacher for a single moment I do not think I am allowed to ask questions any more. I did not bother to listen, so why should my teacher bother to answer? Maybe I would already know the answer if I just had listened...
That is a bit how I feel here, not having read through the vast archives of LW...
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.