When a telemarketer calls, I go horror movie on their asses! I get a little recording of some girl screaming while I use an electric knife on some turkey/ ham with a bone. I pause that, then go outside with my shotgun and say, "Whoops, I think she's dead. Gimme a sec...," I fire a shot right by the phone, then I reply, "well, she is now. Sorry, what were you selling again? Was it something about a phone bill?" Tip: If you try this, live in the country; people tend not to ask questions when there aren't any people around.
Also, I occasionally go for the classic, "Seven Dayssssss," then hang up.
Also, I occasionally go for the classic, "Seven Dayssssss," then hang up.