This is a very interesting paper that looks like it has been used by Google employees to rate if a website is spam. I don’t know if it is real or still in use, but I do know it is a most read!
Spam Recognition Guide for Raters
Introduction
During the course of rating, you may encounter [...]
Entries from January 2008
How Google rate spam - A paper for human spam detector hired by Google
January 1st, 2008 · No Comments
Tags: ppc