[Ghostery]

Adam from Ghostery/Evidon here.

First:Thanks very much to everyone that uses Ghostery here! This thread has been a great read for us.

Aaron is correct.. Ghostery works in the same way NPR works, only with data. Users can opt into data collection in Ghostery's options. Also, even if they do, we go to great lengths to make sure that all of the data are anonymous and only used in aggregate.

The extension will never collect anything if you don't volunteer it. The data are used in all sorts of ways to make the internet a better place, and to help us make money. For instance, website owners can use the data to see what 3rd party scripts are running on their sites and eliminate them. This saves load time, prevents data leakage to leeches, and - most importantly - allows them to provide a layer of privacy for their users.

The BBB also uses aggregated Ghostery data to monitor self-regulatory efforts - thanks to our awesome panel volunteers we can literally "track the trackers."

More info: http://mygho.st/D

My contact if you have any questions: adam _ at ghostery _dotcom