22. out of this world
If you're just so bitchy that you can not play dirty and give out your friend's phone number, there's a less cruel way to abuse the privilege of even having it. All about this roommate prank screams only that it was done in a college environment, with the perfect sample population ready to attend.
Although the person who initiated this prank with outstanding proportions did not necessarily have the satisfaction of watching the results of the prank, it is a pleasure to know that the person receiving these calls will be unimaginably stunned. Imagine your phone is ringing all day long and you are responding to strangers calling Wookiee sounds from the other end of the line.