A simpler variation was played on me when I was but a mere first-year at U of
Toronto. One day, I was logged in at a terminal and I left for a few minutes
to go collect output from the printer. A friend of mine leapt into action and
changed my prompt from $ to 'Login incorrect. Login:'. Then he logged me off.
He told me that the daemon had logged me off because I'd been on to long.
Needless to say, when I tried (and unbeknownst to me, succeeded) to log on, I
was told that I hadn't logged in correctly. Well as I said, I was a first-
year and thoroughly unfamiliar with UNIX so I became very confused. My friend
did tell me what happened, however, since we were limited to 5 hours a week.
Incidently, he's no longer my friend (oohhh hint hint hint).