(not grandparent, but similar situation) I've been here for a while, and I think it is difficult to participate at a level that gets lots of karma. I limit by intake of HN with the "Hacker News 100" feed, so that you all can filter my content for me (I'm going to miss good articles anyways, so I might as well not miss the popular ones). This also means that most things have already been said, or the conversation is dead, and even if I asked a great question, I wouldn't get a response.

This hasn't really bothered me, until the average karma/post started getting shown, which showed me that I get upvotes on less than half the things I say. Now that pg is also pointing out the correlation between new accounts and undesirables, I'm worried about...something (not sure what).