Polite Notice, Dammit!
by Chris MacDonald
This one is from Samantha Brennan. It’s posted at the University of Sheffield’s conference housing.
I like the fact that this sign actually asserts that it is, in fact, a polite notice. I guess the “thank you” at the end wasn’t enough.
Normative Signs: The Poetry of "Ought" 
I’ve always assumed that this was so you would misread it as “Police Notice” and actually take some notice.