I'm a huge fan of Apple products, but they're really abusing the special permission they were granted and are abusing the public's trust.
What are the details of that special permission? How did you find about these details?
The sign is still transparent, at least. I don't know what details you have on the arrangement, but I can imagine such signage being allowed in that agreement and planned for all along.
I can easily also imagine them putting it up without checking first to see if its OK
(PS, I bet it's got holes like those annoying bus ads. I hate riding in those things!)