Comment by hnbad

You don't leave iris prints everywhere you go. Even most fingerprints you leave are unusable for identification. Contrary to what CSI may have taught most Americans, even usable DNA samples aren't a given.

Biometrics aren't "publicly available" let alone "easily obtainable". They're easy to extract from you but this is why extraction and retention of this kind of data should be considered extremely invasive and sensitive. That wallet in your pocket may be "publicly available and easily obtainable" but that doesn't mean we should treat it as such - rather we should make sure it's actually illegal to do so without your consent: that's why theft is a crime.