Do this, don't do that, can't you read the signs?

Stephen Abram has posted a seven-step for reviewing all of your library signage. I'm considering his advice, especially #2 (about how many signs say "no" vs. "yes") when it comes to the new signs I'm putting up in the Friends bookstore. When recently asked to create a "no food/drink/pets" sign I posted one that asked customers to "please enjoy their food, drink, and pets outside". It gets the point across without saying that word no one likes to hear.