I only comment occasionally. I comment even less on other sites I frequent, like reddit (before I quit), lesswrong and ribbonfarm. I normally only comment when

I only comment occasionally. I comment even less on other sites I frequent, like reddit (before I quit), lesswrong and ribbonfarm. I normally only comment when I have a point I really want to make, and no-one else has made that point already. I'd guess there's a lot of people like you - most online communities have a very disproportionate amount of lurkers.