It is clever, but I oppose advertisements that play with, draw upon or share features with safety or warning notices that could in any way be mistaken for the real thing. So, those AXE images in a photograph in magazine would be fine, but not on the walls or hallways of a public building.

(In the last European Parliament elections, one of the candidates in Leinster used flashing signs of the same design that are used to warn motorists of temporary hazards on major roads. Such was the hue and cry that she dropped that approach.)