hacker news

There was a Stack Overflow blog post today about Hacker News's lack of downvoting, and how that was bad. There's a great discussion of it over on Hacker News. As a matter of fact there is downvoting, but it's not very evident from a cursory glance.

Both Stack Overflow and Hacker News feature user voting. Users can vote on links, questions, and comments posted by other users. The votes add up for the user, which in turn lets them do more with the site. With the vote systems, the community can decide what's on and what's not. It's community moderation.