In other words: Moderators who enforce the spirit of HN and have the ability to just kill stuff. I'm really surprised this isn't happening already. If I go post some derogatory remark on a heavily moderated blog or forum, it's get's junked almost immediately.
The old weights were ok for the more engaged users we had a year ago, but now the ratio of votes to flags on a fluff story tends to be a lot higher.
http://news.ycombinator.com/item?id=2351266