Yahoo Beacons
 

Yahoo appears to be getting a little invasive. Following from their revised privacy policy.

Web pages may contain electronic images (called a "single-pixel GIF" or "web beacon") that allow a web site to count users who have visited that page or to access certain cookies. Yahoo! uses web beacons in the following ways:

Within the Yahoo! Network


Yahoo! uses web beacons within the Yahoo! network of web sites in order to count users and to recognize users by accessing Yahoo! cookies.
Being able to access Yahoo! cookies allows us to personalize your experience when you visit Yahoo! web sites that are located both on and off of the yahoo.com domain. For example, Yahoo! GeoCities pages are mostly located on the geocities.com domain.


Outside the Yahoo! Network

Yahoo! uses web beacons to conduct research on behalf of certain partners on their web sites and also for auditing purposes.
Information recorded through these web beacons is used to report aggregate information about Yahoo! users to our partners. This aggregate information may include demographic and usage information. No personally identifiable information about you is shared with partners from this research.
When conducting research Yahoo!'s practice is to require our partners to disclose the presence of these web beacons on their pages in their privacy policies and state what choices are available to users regarding the collection and use of this information. You may choose to opt-out of Yahoo! using this information for this research.


I opted out.

They probably also count how many people opt out :eek: