One of the funniest (evidently home-made) signs I have ever seen. I spotted it in an alley on the Plateau in Montréal while walking over to Scott's apartment, and had to stop and take a picture.
The sign says "please pick up [your dog droppings]", the verb ramasser meaning "to pick up, to gather". At the top of the sign is also the warning "Attention Danger Public", the meaning of which is fairly obvious. I love this clever mimicry of the usual warning signs that one sees around cities.