Interesting social experiment

Came across this article, 5 years old now.

Really interesting.

http://www.washingtonpost.com/wp-dyn/content/article/2007/04/04/AR2007040401721.html

Wow-that's pretty cool stuff. Where do you find such articles? Was this just a one-off or is there some kind of recurring 'thought-provoking article' (to use such a clunky phrase).
If this is a recurrance, then do send me the link-I was serious interested by this one. Made me laugh a bit as well. I'll see if I can find something else like that, but don't count on it-humour is my 'zone'.