On a recent Tuesday night, during a session of rash bedtime scrolling, I sold my Facebook data to a stranger in Buenos Aires. Reckless, maybe, but such was my newfound life as a digital vigilante. My tipping point was the Facebook hack, exposed in September, in which I—along with some 90 million other potential victims—was temporarily locked out of my account. I imagined my identity rippling across the internet, thanks to the single sign-in convenience of Facebook Connect.

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