This thread is very nice.
When I was in elementary school, we used to prank call people all the time. Yes, the era before caller ID. We would conference call two pizza places and then mute ourselves before the call was connected. Then it would be the Dominos guy asking the Little Caesars guy why the **** he called him in the first place, or it would be the manager at Hardees eventually picking up on the female McDonalds worker.
My most infamous incident occurred when I found my little brother's 3rd grade phonebook. The school had published phone numbers of all the kids K-6, in order of their teachers, and I decided to have some fun with little Tommy Jensen. I called his house, and no one picked up, but the answering machine did. I left a message, detailing how I was getting all of little Tommy's classmates (saying their names, as the phonebook outlined them) to beat him up after school tomorrow. Nothing vicious, just letting the little 3rd grade bitchass punk know we meant business. The message wasn't longer than maybe a minute or so. I hung up, feeling satisfied with my efforts, and left the room.
Some ten minutes later, our house phone rang. My older sister picked it up. Immediately from the tone in her voice, I knew I was in trouble. So I ran to the bathroom and locked the door. Sitting on the john for the next five minutes, listening to my sister try to dissuade little bitch Tommy's hysterical mother of the notion that her son was the target of a grade-school assault case, I unlocked the door and lurched my way to the phone to apologize. Apparently, the mother had heard my message, and became so frantic that she immediately called the police to find out who left the message.
Luckily, I was pretty good at weaseling out of trouble back then and told the bish that I ain't even know her little punk bitch kid, and it was all a joke, and, "yes, I'm sorry to have caused the trouble." Case closed.