Summary; When it works against the computer algorithm it makes you very obvious to the people around you.
Choose your poison; stand out in a crowd and be unrecognized by the digital survaillors, or risk NSA tracking recognition and pass unmarked and unnoticed among the teeming mass of mankind!
(You will not be noticed wearing the camouflage, of course, if you are at the circus or Comicon, or I suppose, at any gay pride parade!)
Long hair, half in the face works.