This reminds me of my favorite childhood phone prank. I'd pick a number out of the phone book at random, and run through this little script:
Guy: Hello?
Me: Mr. Fagbomb?
Guy: Yes, this is Mr. Fagbomb.
Me: Good afternoon, sir. This is Jefferson Davis calling from the Sanitation Dept.
Guy: What can I do for ya today?
Me: Mr. Fagbomb, I'm calling to inform you that we are disconnecting you from the sewer system. The disconnect will take place tomorrow morning.
Guy: Huh? What's going on? I'm sure I've paid my bill. Is there a problem?
Me: No sir, your account is in order, and all the connections seem to be in working order.
Guy: Then why in GOD'S NAME are you shutting me off?
Me: Frankly, sir, we're tired of your shit.
Guy: Wha....HEY!!!!
*CLICK*