Comment on Nofollow Wikipedia? by jay-jet
If it ever got to the point where everyone no-followed every link, it would be the same as every website on the internet linking to every website on the internet - which would be the death of pagerank. This is the vulnerability in the pagerank algo - thus Google is prompted to look for other ways to evaluate nodes in the index….i.e. toolbar data, click-thru data in serps, human-edited directories, etc