Never Trust a Palm Reader: Risks of Biometric Data Collection and Panera's Palm Scanners
Concerns over biometric data collection (fingerprints, facial/voice recognition, retinal scans) are growing, to the point where several states now have legislation pending on what companies can collect, and how such data can be used, stored, sold, or shared.
The biggest problem, however, is the number of people who will happily provide this data for a few seconds of extra convenience, at places like Panera Bread.