The sign in the photo has been "Photoshopped" so trying to figure out where it was taken is a rather pointless endeavor.
I assume your conclusion is related to the jpeg artefacting around the black-on-white lettering?
But that is a normal characteristic of jpg images. In this photo it just stands out because that lettering is the _only_ grouping of high contrast black-white shapes in the image. However if you look closely at all other light-dark lines in the image, there's a similar amount of artefacting, just lower contrast because the primary feature is also low contrast.
Something that makes me tend to think it's a genuine image, is the vertical bar of diffuse shadow across the text area. There are no visible flaws in the edge shading of that shadow, which would be difficult to get right in photoshop.
Btw, the sign's wording is not logically inconsistent. They didn't specify the order, or claim that the electrocution would occur at the box. It could mean the fine first, then execution by electric chair. They're just being polite with their threat.