Facebook's most recent API allows applications to post status updates to a user's wall without their intervention. This is part of Facebook Instant and is known as frictionless sharing. This means users no longer have to proactively decide to share an item, and there's a risk that something could be unintentionally shared with Facebook friends. This is an addition to the growing list of Facebook privacy concerns. Nic Cubrilovic, a hacker and blogger, recently showed how Facebook could track every page a user visited -- even after logging out of the Facebook network.
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