One Way?

Clear Direction 

I don't understand why people post stickers on signs. I guess I'm getting old, it really does not make much sense. In this case, it's even more confusing, these signs are 10 feet from the ground in an ally behind the Hooters in Long Beach. You would need a ladder to reach them. Who would put them up, and who would read them?

Maybe at 10 feet off the ground, the city works can't remove them?