I forgot to tell you that here in Quebec, in a small village named Sainte-Élie-de-Caxton (which is now really famous due to and incredible artist storyteller, Fred Pellerin, who is living there,) there are signs of "Beware of crossing Elves". You can have a look at 
RE: A NEW WAY TO READ ROAD SIGNS IN CANADA : PART 2- ANIMAL CONCERNS