According to Stanford researchers, hundreds of leading Web sites share visitors' names, user names, or other personal information with advertisers or other third parties, often without dislosing in privacy policies that they do so.

"Sixty-one percent of websites tested by researchers from Stanford Law School's Center for Internet and Society leaked the personal information, sometimes to dozens of third-party partners," writes The Register's Dan Goodin.

"Home Depot, for example, disclosed the first names and email addresses of visitors who clicked on an ad to 13 companies," Goodin writes. "The Wall Street Journal divulged to seven of its partners the email address of users who enter the wrong password. And Photobucket handed over the usernames of those who use the site to share images with their friends."

Go to "Hundreds of websites share usernames sans permission" to read the details.

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