I agree that is odd, there is also distortion/artifacts/copy & paste errors with the background. Note the number of bars/misalignment of the bars on Tatters and the advertising. Can also see what I am guessing are remnants text in the top right of the sign. The shape, as previously mentioned, is also odd, would have been relatively simple to just blank out/edit the text. The new shape could be, with a bit of head tilting/squinting be half of a keystone, but thats a bit weak imo.
Did wonder if it was a phones not switched off ref, "switch off" is missing. Might be a bit of a basic theory, also does not explain the shape change.