A Canadian psychologist tells a student newspaper that he once--in 1974--used LSD. The psychologist is stopped at the US border and made to sign a letter that he violated the U.S. Controlled Substances Act because U.S. customs officials had Googled him. (English translation; original article in French is here.) The psychologist might now be prevented from entering the U.S. for life.
Watch yourselves, people. Google Remembers All.
Link courtesy of my colleague, Denis Pelletier.