These days big brother is everywhere, with $10 or so worth of items you can build your own invisible "mask" to avoid any kind of identity exposure ! Here's a brief description as to how this works and why it's cool :) You take a hat that looks good on you, hacking it to be a face mask for any kind of : Hidden, Security, Paparazzi or family member's video camera ! At the same time, when people look at you with the naked eye, they see nothing but you wearing a hat! Now that's what i call stealth ! You can build it for as low as $10.00 -Materials Needed- 8 or more High Intensity IR LED's = $0.30 each that's $2.40 1 Hat/Cap that looks good on you = $6.00 you may have one all ready 16 Thin wires that i got from a 2 meter long UTP cable = $1.00 1 Electrical Tape = $0.80 -Total Cost = $10.20- For a better understanding of the project and it's effect i recommend you view video !
http://www.instructables.com/id/The-Invisible-Face-Mask-/