Increasing amount of stray cats in Valley Street

I as I have being walking around the street of Valley Street I noticed there are plates of cat food places along the walkway this cause the growth rate of stray cats in Valley Street along with the amount of litter being pile up as the person who places the plate of cat food did not bother to clean up the place. I do hope that the person that does this to stop doing this as it will cause problem to the  resident of Valley street because the cat will drop their cat shit all around the place and the whole place will start to smelly after sometime.