it's not the end of the world

Turn all the hate in the world
Into a mocking bird
Make it fly away
SFA: It's Not The End Of The World

I pass this old school house on the ride to work. Never stopped before, but seeing as it wasn't raining for a change I took a very quick look. Will have to come back another time with properbigcamera and see if I can get a better view inside. It's overlooked by houses so I'm quite wary of attracting unwanted attention or be accused of adding to the already rife vandalism that it has fallen victim to.
One thing I did notice was scrawled on a boarded up door, the words "caution - rat poison".
Is that for the benefit of well educated rodents?