For my voice mail, I have it play the sound clip: "I'm sorry, but all questions must be submitted in writing!" You know how many people hafta dial my number at least twice to make sure they dialed the right number? Too funny! One of my uncles called the number one time, and later on told me, hey, you gave me the wrong number, you gave me the number of a professor or something. hahaha.
i always hated leaving you messages because of that thing. it irked me.