How about just turning off the camera?

How about just turning off the camera?

This is more to thwart facial recognition that is used wherever you are in public places (there are always plenty of CCTVs there).

I could go for a pair myself. Might be fun to wear at the next public protest (since masks are forbidden).
The low cost alternative has been pixellated facepaint or similar:
http://images.der...0829.jpg

With this knowledge in hand, I see no reason I can't build my own.
I envision a series of infrared leds attached to a hat or scarf or on lapels of shirts, jackets, etc. Bright enough and they would achieve the same effect. Keep the batteries charged up with tiny solar cells, like the ones in pocket calculators, and you won't have to worry about the batteries going dead at an inopportune time.

I throw the facial recognition system off simply by wearing a Bin Laden mask. Of course it will trigger their alarms, but then they soon realize there's no need to bother.

Lens filters. Good grief, they've been around for film cameras for just about forever.
From the comments, it looks like nevertheless lots of people would be willing to pay for the illusion.