User-based scoring is great way to automatically moderate user comments, many websites feature some form of upvote/downvote, digg/bury, agree/disagree, happyface/sadface, etc. voting scheme, this post is about reddit's comment system (pictured), which I happen to be quite fond of (albeit, for a multitude of reasons). The most simple, and most popular, form of moderation on such websites is to ran
![Reddit's "best" comment scoring algorithm as a multi-armed bandit task](https://cdn-ak-scissors.b.st-hatena.com/image/square/d65c20297ddd9be79753648c185b85d6c839fda0/height=288;version=1;width=512/http%3A%2F%2F1.bp.blogspot.com%2F-7-kgnnZdqSA%2FUWZwOYhVGpI%2FAAAAAAAAAiY%2FrYuqhjKnQLg%2Fw1200-h630-p-k-no-nu%2FScreen%2Bshot%2B2013-04-10%2Bat%2B10.54.16%2BPM.png)