Mecklenburg County court officials are warning people not to fall for a series of prank phone calls and texts. The calls try to trick people into believing they failed to report for jury duty. From the website humorhotline.com, pranksters have forwarded a text message or e-mail that tells people to call a number. When they call, they receive message that informs them they will by fined $500 and serve a 30 day jail sentence for failing to appear. The end of the call lets people know it's a prank. But Charles Keller, a spokesman from Mecklenburg County Courts says many people have stopped listening by then. And they're not laughing. "Citizens are upset, and they're concerned, and frightened, because they're listening to this message which is pretty ominous." Keller says the court started receiving phone calls last week. The calls were continuing this afternoon.