Someone I knew. . .
. . . .back in Netware days, had a "Pearl Harbor" process running on his network. He would have to reply to a prompt with the correct passphrase every (14+RND) days, or it would start another (14+RND) day timer.
He never had to use it: the Boss let his nephew "inventory" the server room, and there was enough damage done (these were the days when a sudden power-down could crash disk heads. . . ) that the company went out of business. . .