Here in Austin, there used to be a huge "memorial" spraypainted on the street in an old residential area close to downtown. It was a crude picture of a cat, as wide as the street, and underneath it it said, "You killed my cat and didn't even stop. Thanks, asshole." It was there for over a decade, occasionally getting a new coat of white spraypaint to keep it from fading.
So anyway, about 5 or 6 years ago, the guy who created it died. He was hit by a car.