Shrink,
I have always wondered about the corollary, ie. why do so many people post here as opposed to lurking? Seriously, >90% of the posts are worthless/superfluous/unnecessary/redundant, and these posters would do us all a favor by lurking rather than posting. (I love EXILARCH's post..."It is better to be silent and be thought a fool, than to open one's mouth and remove all doubt.")
I am the classic lurker; I have visited this site at least 10X more just to read the posts without posting myself. I'm posting more now just in anticipation of meeting some posters at the RX Vegas Bash(I was out of town last year).