Update #1: My friend Amy Helfand send the image, below, of the handwritten sign currently posted on top of the sheet steel box. The one calling the box-makers meanies and art-concealers has apparently been removed:
This suggests they cut out the wall and that the steel plate is just covering a big hole, but I suspect that is a red herring.
Update #2: The property owner has finally gotten it together to remove the wall. Walking past, this evening (Sunday, October 27th) I found him observing two laborers who were drilling out a kind of postage-stamp perforation all the way around the outside of the piece. The building appears to be made of brick, not block, to judge by the brick dust, below.
Me: "I'm on a public sidewalk, I can take as many pictures as I like."
Dude: "Good answer. But if you write something, you have to tell us, and if it is something bad, you are responsible. We are preserving it. If it was your wall, would you spend $3,000 to preserve this artwork?"
Me: "I have no idea what I would do. The whole thing has been a comedy since the beginning."