Guinnessy writes: "We've all accidentally typed in a wrong email address sooner or later. But can it all go horribly wrong? On http://www.spamresource.com there is the story of Nadine, an account of what happened after an Internet user accidentally gave a wrong email address when she visited a web page and signed up for a sweepstakes. Live in fear...."
Some programming languages manage to absorb change, but withstand progress.
-- Epigrams in Programming, ACM SIGPLAN Sept. 1982