I don't provide fingerprints any more at the global kiosk when entering the US. It takes my picture and already has my data. I don't even scan the passport now.
The system know whom I am. Which is good. Because I'm me.
I used to do a lot of clown work; parties, parades, rodeos, etc. I was often intrigued by how easily people might recognize me fully made up, despite full face, costume, sponge nose, etc. I wouldn't have recognized me, but a lot of people did. The ability to map and recognize facial features and data points, by the hundreds or thousands, is instinctual and trainable in people, and programmable in a computer. I'd make a terrible computer, but the various systems in use do remarkably well. I expect that even well qualified efforts at disguising identity will frequently be foiled by such recognition technology.
Expect to see it in the cockpit sooner than later, too.