I recently acquired a lithography of M.C. Escher that has that same white wall - with stones taken out and "funny figure" in front.
Much to the dismay of Escher, he was very popular in the "psychedelic" hippie community in the mid sixties up until his death 1972.
Gerald Scarfe added the "asshole" judge to "the wall" cover art - not very surprising if you have noted the obsession of Anglosaxons with buggery.
I make the case that you can not take "artistic occurrences" out of a bigger context.
The masters from impressionism, expressionism, futurism, suprematism, abstract, cubism... were subscribing to making art just for the heck of making art, not longer making art for a superpower-that-be.
This is also true for the music composers at that time and the Linux project now.
Yes, engineers are the truest artists in my viewpoint, trying to give plastic and functional shape to (irrational) aspirations of a society - the essence of art.
The essence of the artist is to communicate - like holding a mirror to his community on their and his aspirations.
Nowadays artists want to make a living...okay, but don't be surprised as an arty farty snobbistic collectioneur you will not find me sympathetic to DRM and your copyright lifetime ad absurdum.
In fact, don't be surprised that I don' t care about your "art" in the first place.