Like over the summer there was this guy called "Y@mada" who weaved a boring tale of caution and tempering PGs unabashed optimism with some feet on the ground practicality as the economy was going to crash in a major way any second now. Obviously he was wrong because everything is smooth sailing, but PG didn't like this pessimistic world view so despite forums with like, 50-60-70+ posts, eventually the posts would just be deleted / marked "dead", etc.
But try something else. Put up a post like, "Ask YC: Do you sleep on your stomach or on your back, and which do you think is better for an aspiring programmer" and I GUARANTEE YOU that post will be up forever, sparking countless debate.