Say it!
Communication comes in many forms, it’s important to get the message out. Say it, however temporary, wherever possible with whatever materials are handy. State it multiple times if need be.
As a visual artist, I’m keen on letterforms, fonts and signage big and small. I have a soft spot for the quirky, grammatically-challenged, warn and forgotten ones.
For your viewing pleasure, here is a sampling of old signage and hand-crafted messages. All images found as is, except the last one, heh, heh, heh.