Not exactly fooling a client, but in the same ball-park!
I suppose every organization with a public face attracts its share of strange enquiries. I fielded some of them on behalf of our PR department. The best was someone who wanted to know when an iceberg had calved so he could verify a telepathic message from a penguin... (No, it wasn't Linus!)
My technique was to explain calmly and logically why we couldn't provide the information (length of Antarctic coastline, scale differences between penguins and humans, icebergs calving at all scales from things the size of small countries down to stuff you could use in a drink).