here’s some links to some articles on Brian Kennish’s blog. former employee of google worked on google chrome and now works on 2 extensions for chrome called “Disconnect” and “Facebook Disconnect” which prevents this tracking. one talks about how facebook tracks non facebook users.
http://disconnect.me/blog/facebook-forced-to-admit-tracking
http://disconnect.me/blog/how-our-browsing-history-is-leaking-into-the-cloud
http://disconnect.me/blog/facebook-bug-tracks-everybody
maybe the functionality of these extensions could be added nativley in dragon. the code is open source. here’s links to the extensions.
Disconnect
Facebook Disconnect
https://chrome.google.com/webstore/detail/ejpepffjfmamnambagiibghpglaidiec?hc=search&hcp=main
the link to the code is here