I hate it when people lie with pictures. Robin Unger submitted the top image in the collage below. Notice how narrow the signs look compared to how they look in the film, which you can see below it. He- or somebody- made them narrow by adjusting the aspect ratio of the whole picture where everything got slimmed down, including the signs. Then they colorized it to make the steel grey metallic post stand out, which you don't see in the movie. In other words, they went to a lot of trouble to sell an idea that there's nothing fishy about those signs, but the very fact that they did that proves that there IS something fishy about those signs.