I Want Iraq And Roll All Night
I'm no lawyer, but I'm told that defacement of currency is a violation of Title 18, Section 333 of the United States Code. That doesn't seem to stop inveterate doodlers from making funny drawings on dollar bills:
From 30 Bizarre Examples of Defacing Money at the Money Mumbo Jumbo.
Artist Hanna van Goeler likes to use currency as her canvas, and her paintings on money include maps!
Van Goeler says her work "focuses on what's 'between.' The interstitial, ambiguous, complex, transitory, changing, mystic, hybrid, un-named." Considering that the average lifespan of a dollar bill is 6 months... currency is certainly transitory...
Currently her work can be seen in Zurich, Switzerland and New York City.