>What would happen if every single user enabled their minimum karma filter?
Hacker News would be a much better place.
In fact, filter stories as well as users. I want to filter out any story with fewer than three upvotes and any flagged comments. That would improve quality tremendously.
How would any new user earn karma in that system? How would any story get upvoted?
Again, this system can only work if there are at least _some_ people that are willing to upvote newbies and read new posts.
It sounds like what you want isn't a community with collaborative filtering, like Hacker News, but a newsletter with editors, like Slashdot for example.