Yeah but there's a direct relationship between bad threads and the account age of the people who make them. Go on SG on GT right now. I found 10 threads that were complete garbage that were made by members of less than 7 days, and another 5 or 6 that were made by members of less than 3 months
You have to appeal to new members, but you also have to satisfy those that you already have, and that includes addressing the quality of their experience.