Photographic evidence of the long history of being told to do this and don't do that....
|George Eastman House|
Take a Kodak with you! Autochrome, ca. 1917. Source
|State Library of New South Wales|
Keep your feet off the walls. Australia, 1947. Source
|National Library of Scotland|
Two WWI soldiers at a village sign, coming with the quietly devastating caption, "Owing to modern artillery, captured villages have to be marked with a sign board." Source