"[****Here is what o do if your phone allows it. Usually they call the same time of day... so if you anticipate the call within an hour or two.. call forward to a disconnect number. something generic like 555-123-4567. When they call and get it.. and realizing it's an invalid number.. they will stop calling.]"
-OR-
I answer and pretend like im the recorded operator - its less work. (if im not at work) or just dont answer. it can be fun if your friends see you doing it - they are like WFT - then i get to explain this all over.