Hacker News Reader

I would personally feel that that wouldn't help as much, as many of the new accounts are just people wishing to express their (perhaps unpopular) opinion without putting their main account and thus themselves in negative light.

Or make it cost 10 karma to submit a story. But keep self-posts free so they could still be done anonymously.

(or implement Chaumian blind tokens to transfer karma between accounts...).

Seems a bit extreme. Two of the stories currently on that list made it to the front page.