I work at a church, and when I'm there I make my lunch in the Ministry Center kitchen. Since lots of people share the space, there are labels everywhere to show where you can find plates and bowls, serving utensils, pitchers (and so you can put them away). There are also more pointed notes. Every time I use the sink I'm newly delighted to read the three line poem printed beside it in all-caps label font, each line on its own little sticker:
Do not leave dishes in the dish drainer
And put them away
It has a certain William Carlos Williams feel, don't you think? My favorite thing is that (as indicated by contextual clues) each line was added separately, later than the line above it. It's not the most frustratedly direct of the signs in that kitchen, but it's certainly the most delightful!
(Naturally, there are always dishes in the dish drainer. But never mine!)