There's no questioning the fact that signboards are meant to guide us. Period. Why else would we listen to piece of board with some random text on it? Come to think of it, signboards are perhaps the most important things on the planet. You're in a new city. You know nothing about the routes. A signboard helps you. See? Signboards make life easy.
However, there are always exceptions. Like these signboards who turned rogue. Now either the signboards are drunk or the people who made them were. You decide.