I can't find the original source, and the intermediate source (Australian, by the looks of it) is woefully NSFW or family about 10% of the time, so:

Here's an unsourced pic of some funny graffiti. Hailing as I do from the 60's and 70's, when graffiti was far more intelligent in content than just spraying your name over n over like a peeing dog, I have to say that I ... "appreciate" i guess is the best word — intelligent graffiti, even while disapproving of the property crime.

E.G. : we had a car spray-painted this week for the second time by the same, unimaginative gang. Bo-o-ring. And it doesn't enhance the value of the car. Therefore, that is bad, stupid graffiti.

"Good" graffiti may even enhance the value of the altered object. E.G., this elevator button:

Now, if you don't get it, don't try. But it made me laugh.

:EOF