I grabbed this pic out thar...in the tweetstream. Somebody chalked it in solidarity with the campers at the Wall Street Camp. I heard that a couple protesters were arrested for chalk writing. Not sure if that's fact or rumor...but justincase
NYPD: you do know that chalk washes off with the rain, fades from the sun--don't you? That's why they sell it to parents of little kids (and grandmas). It's a fun, and temporary way to express your creativity through ART.