Anarchic collaborative LED art

What a neat idea: Instead of vandalizing the walls next to your favorite section of your train ride to work/university/whereever with pointless graffitti, you can you channel your artistic aggession into something much more subtle: LED throwies! The Web 2.0 version of grafitti. An LED throwie is a little glowing LED with a battery and a magnet attached to it. You can build one yourself (instructions here) for less than 1 EUR apiece. The idea is build hundreds of them, to wait until nighttime, grab some friends and toss them to metal surfaces. Anarchic collaborative LED art. Batteries last for 1-2 weeks depending on the color of the LED.