Biometrics are unsafe as hell. It's often amusing how easy those systems are to circumvent (printing out a picture of someone for face recognition for instance,

Biometrics are unsafe as hell. It's often amusing how easy those systems are to circumvent (printing out a picture of someone for face recognition for instance, fingerprint scanners near to places where you leave fingerprints like a door handle). One common failure of biometrics is that they often fail to work reliably and then you have to offer a feedback mechanism that offers really low security. Security is always only as strong as its weakest link.