Facebook, MySpace and several other social-networking sites have been sending data to advertising companies that could be used to find consumers’ names and other personal details, despite promises they don’t share such information without consent.
Advertising companies are receiving information that could be used to look up individual profiles, which, depending on the site and the information a user has made public, include such things as a person’s real name, age, hometown and occupation.
Most social networks haven’t bothered to obscure user names or ID numbers from their Web addresses, said Craig Wills, a professor of computer science at Worcester Polytechnic Institute, who has studied the issue.
The sites may have been breaching their own privacy policies as well as industry standards, which say sites shouldn’t share and advertisers shouldn’t collect personally identifiable information without users’ permission. Those policies have been put forward by advertising and Internet companies in arguments against the need for government regulation.