Something like this would seriously take all the fun out of Facebook. 
But Yann LeCun aims to stop such unbridled behavior—or at least warn people when they’re about to do something they might regret. He wants to build a kind of Facebook digital assistant that will, say, recognize when you’re uploading an embarrassingly candid photo of your late-night antics. In a virtual way, he explains, this assistant would tap you on the shoulder and say: "Uh, this is being posted publicly. Are you sure you want your boss and your mother to see this?"
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