The solutions based solely around cookies only will help with that particular mechanism. Over the last year, I've seen a couple of articles similar to the foll

The solutions based solely around cookies only will help with that particular mechanism. Over the last year, I've seen a couple of articles similar to the following: http://news.ycombinator.com/item?id=1714446 http://news.ycombinator.com/item?id=1714446 and http://news.ycombinator.com/item?id=2891369 http://news.ycombinator.com/item?id=2891369 Where "cookies" can be stored in more than just the traditional cookie.db. I haven't looked to see if FB is making use of these alternative mechanisms, but other sites have.