Who knows? Some little mom-and-pop juice-bar, probably not. Megalocorp like Starbucks with millions to spend on such a project, quite possibly. After all, b

Who knows? Some little mom-and-pop juice-bar, probably not. Megalocorp like Starbucks with millions to spend on such a project, quite possibly. After all, birth-date + gender + zip-code is enough uniquely identify 87% of the population - what's the chance that I've inadvertently let slip some information in addition to my name? Maybe gender, plus first name plus zip-code of the point-of-purchase is similarly revealing? The thing about privacy is once you've lost control of it, you can never get that control back so staying vigilant is important. http://www.forbes.com/sites/adamtanner/2013/07/22/how-just-a-zip-code-can-tell-a-marketer-exactly-who-you-are/ http://www.forbes.com/sites/adamtanner/2013/07/22/how-just-a...