Maybe you should do this in a meta-site like Disqus, that'd be interesting. I could see why a site like Reddit/Digg wouldn't want to add a feature like this, i

Maybe you should do this in a meta-site like Disqus, that'd be interesting. I could see why a site like Reddit/Digg wouldn't want to add a feature like this, it would probably encourage the wrong sort of behavior. But human nature is human nature, there's always going to be a market for a pissing contest, why not capture it? :D