Rick Astley's never going to give you up and your friends are never going to leave you alone. Thanks to Internet pranksters, people can punch a phone number into a website or post links online that expose unsuspecting victims to blarring verses of Astley's 1980s number one hit, "Never Gonna Give You Up." Students have taken to the phenomenon, dubbed "rickrolling," and use it to harass friends online and over the phone. It began with Internet forum users posting seemingly relevant links, usually in the middle of a message board discussion, leading unsuspecting readers to a video of Astley professing...