completely ineffective, the more you research the more bits of information you realize are leaking off every single thing that makes you unique. your gait, smell, heart-beat (detectable at range), posture etc are all just as identifiable by a computer as your face.

It supposedly is true that putting on black and white face makeup as if you are a fan of Insane Clown Posse, however, it would tend to make you stand out in a crowd, if you were walking down the street...

I'll have a Klaus Schwab mask on the back of my head, like the tiger hunters of old.

Depends on if the target is a specific person or "any human trying to run away"