In an act of Civil Disobedience, self-proclaimed "Greenie" Adrian Saker is stamping every bit of cash that passes through his hands with the words:

***IT'S TIME TO MOTHER NATURE***

Adrian announced publicly via a letter to the Secret Service on his blog, Household Name, his intentions of marking the US tender, and acknowledged the risk of fines and imprisonment he faces under US Law (U.S. 18 U.S.C. 331). 

I have read a lot of responses to this act in the blogoshere and many have speculated that the simple act of stamping money is not going to raise awareness for the environmental movement.  I tend to disagree.  I think it will serve as a reminder to people when the message passes through their hands.  Even more importantly, the fact that he is doing this out in the open will raise some buzz, particularly if he gets busted. 

He is not selling the stamps so if you want to join in you'll have to have your own made.  You can have a free one made at Vista Print.  It wont look like Adrian's and it'll cost you $1.50 to get red ink, but it'll look something like this: