Alice describes her office as a “panopticon” — a structure built for total surveillance. Your office may be one, too. Whether through “voluntary” corporate wellness programs, smart badges that record voices and GPS locations, or surveillance apps in their mobile phones and personal computers, Americans are offering up more and more personal data at work. Most of them don’t have much idea of where that data goes, or how it will be used — and there aren’t that many limits on what employers can find out about their employees, or what they can do with the data. The more people who opt in now, the harder it will be to opt out in the future.