I've said it before and I'll say it again, limit the number of comments and submissions per user per day... See discussion here: http://news.ycombinator.com/it

I've said it before and I'll say it again, limit the number of comments and submissions per user per day... See discussion here: http://news.ycombinator.com/item?id=2242505 http://news.ycombinator.com/item?id=2242505