[oh_sigh]

What could you do to a million or a billion people that would make life a nightmare for them if their biometric data was stolen en masse?

[bkanber]

My concern is not what can be done today, but rather in 15 years.

[victor9000]

Discriminate against them based on medical conditions, persecute them based on "impurities" (think Hitler & Jews or China & Uyghurs), make them targets of fishing expeditions for unsolved crimes, etc.