If it were really for facial recognition, I wonder if they would ban passport pictures taken in the days after a wisdom tooth operation. Those can swell your lower face, pulling your mouth out more than usual. Hell, if facial recognition is so sensitive to changes in soft tissue like the location of the corners of your mouth, shape of your cheeks, or thickness of your lips, does gaining or losing a large amount of weight fuck it up?

I would think that they focus more on the location of facial features that are set in stone^Wbone. On that note though, could you construct lenses that change where your eyes appear to be located?