Prank calls are one of the most unpleasant 'jokes' to be on the receiving end of. No one likes to answer the phone and have either a dead line or someone making comments, shouting or making noises down the phone. Prank calls are so annoying and even frightening for some people. When these type of calls go on for some time they can really disturb a person's life, they jump when the phone rings and will even avoid answering the phone if they can.