The Problem with Becoming Popular
Everyone running a website wants high PR, but it does come at a price if you are operating a site with open commenting.
Here is a story about a site that got great PR, but then some website in Turkey put up a post that said this was a good blog to leave comments on pointing back to your website to boost PR. So now the poor operator gets loads of spam from Turkey. Not that it matters where it comes from, spam is spam.
The thing is though that links on this site are tagged “no follow” so the spam doesn’t even help boost PR!