Researchers at the University of California, Berkeley s School of Information have released a report showing that the most popular Web sites in the United States all share data with their corporate affiliates. Third parties can collect information directly by using tracking beacons known as Web bugs despite the sites claims that they don t share user data with third parties. Read the announcement [berkeley.edu]. Download the full report [knowprivacy.org], read the findings.
Source: https://threatpost.com/report-warns-web-bugs-and-privacy-violations-060509/72727/