Yay biometrics
Went through Faro airport a couple of weeks back; they had automated facial recognition gates for anyone with a suitable en-rfidded passport. Only they were some of the worst systems anyone could have devised.
You stick your passport into the reader, which more often than not fails to read anything at all, despite rfid passport readers being widely used and reasonably reliable these days. Then a little gate opens letting you into the camera chamber. The gate closes behind you. The camera is supposed to either accept or reject you, and the appropriate gate opens to let you back out or through.
For both me and my other half, the system simply locked up, with both gates closed and necessitated *climbing back out* as there were no human attendants there to keep an eye on things. Awesome stuff.
Travellers into Gatwick might remember their iris scanner system for which you had to enroll on your outward flight... only they were often used by people who didn't realise this, and tried to go through them on their return without enrolling, and were locked in the scanning chambers holding up everyone else til some security staff turned up. I avoided that one like the plague, though.