The mountain of evidence piling up this week exposes the rot at the core of Facebook Inc.
Facebook’s troubling relationship with personal data, and the way that data has been repeatedly exploited, show the precarious nature of a business dependent on knowing everything it can about its own users. For a company whose very existence depends on its users turning up regularly, recent events threaten to give people a reason to reduce the amount they share on Facebook—or leave it all together.
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