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Burger King went big on self-deprecating Oscars ads. Now it needs to prove it's fixed past missteps.
Erin McDowell/Business Insider
Erin McDowell/Business Insider; Mikhaila Friel/Business Insider

The Brazilian wing of Burger King announced a surveillance technology marketing stunt this week called the “Hangover Whopper,” celebrating the booze-filled days between Christmas and New Year’s with facial recognition. All you have to do is hold your bleary-eyed visage up to a camera, and the company says its…