[hellofunk]

No, Apple has explicitly stated that hair style, glasses, hats, etc have no impact on the face detection.

[tetraodonpuffer]

so does it mean that to unlock the phone I just have to knock you out and put some sunglasses on you?

[hellofunk]

How would that be any different than knocking someone out and using their finger for the Touch ID?

[koolba]

Well for one thing it'd be a hell of a lot more work to cut off a guy's head vs. just his thumbs (if you want to unlock again later).

[tetraodonpuffer]

exactly the same, which means FaceID is not that much more secure unless as part of the authentication process you have to smile on cue or something