Biometrics are everywhere. Fingerprint scanners are a standard feature in the newest smartphones, DNA testing is common, and facial recognition is getting more and more terrifyingly reliable. But there are many biometric applications still lurking on the fringe, and some of them get really, really personal.
The 49ers are selling fans' information to interested third party companies. (Every team is selling fans' information, but this story is about the Niners.)