This week five California Facebook users joined the chorus of critics. In a lawsuit filed Monday, they charge that Facebook – the Web's dominant social networking ecosystem – unlawfully used their private information or intellectual property without consent.
What's more, they claim, Facebook is merely a data mining and marketing machine that masquerades as a social networking service.
Facebook has become omnipresent on the Web. "At least one family member in nearly every internet-savvy household is on it," says Leslie Harris, CEO of the Center for Democracy and Technology, writing this week on Wired.com.
The breakneck growth of the site over the past five years has come with intense scrutiny. Facebook has been criticized for how it has shared user information not only with third-party vendors but also between users not in one another's network. Facebook does collect user information to share with third parties, according to its terms of service.
Some users have complained that their images have been usurped unknowingly and used in advertisements that appear on the site. One married user's image was recently placed on an ad for "hot singles" – an ad that subsequently appeared on her husband's Facebook page.
Only about 20 percent of members use Facebook's privacy settings to control who can view their personal information. But even with strict privacy controls, it's tough to prevent how your images will be used, experts say.
Privacy groups and some of the site's own members have vigilantly monitored Facebook policies. When Facebook changed its terms of service earlier this year – a revision that appeared to give it broad ownership over users' content even after they...