This is cool, and I will probably use it sometimes to help force myself to waste less time, but isn't there some risk of a 'tragedy of the commons' (maybe not the right game theory term, but one of those) where too many people want to see only high point submissions so fewer people are around to vote low point submissions into higher ones? Maybe even some adverse selection where now the people viewing lower point posts are the ones who care less about discovering high quality posts, thereby making it harder for those posts to get high points?