That online menu you read by scanning a QR code might still be tracking you, and privacy experts are worried

Women use a QR code to order lunch with their smart phone while outdoor dining.
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Some digital menus are tracking your purchase history and personal data, NYT reported on Monday.Offline behavior such as eating out with friends can be tracked online, worrying privacy experts.QR codes can help small businesses better understand customer behavior and cut labor costs.See more stories on Insider's business page.
At many restaurants, a physical menu might be considered a bi