I recall reading a story about a fireman who was tired of getting calls about cats in trees. His response to calls was to ask, "Have you ever seen a cat skeleton in a tree?"
I feel like saying that sometimes. This weekend there was a cat in a tree. The neighbors were up in arms. There were angry phone calls as to why we weren't responding. First off, we do not have a cherry picker to pluck an unfortunate cat out of a tree. Secondly, if a crowd (including dogs) stands at the bottom of the tree, yelling for the kitty to come down, it won't come down.
We usually recommend that someone places a can of stinky cat food at the bottom of the tree and let the cat come down on its own.