my wife gets a kick out of it when i act like an old man and tell them "you'll have to speak up, i cant hear you" and so of course they speak louder then i speak louder and then they speak louder and,... well you get the idea
eventually we are just hollering back and forth untill they finally hang up. i have heard them say some pretty vulgar foul and filth thinking i cant hear them
i have also been known to speak jiberish to them and they cant seem to figure out what language i am speaking, now thats a real fun one. but with caller I.D. i dont do alot of that anymore.
