Libraries as password keepers

Here at the IA Rural Sustainability conference, we're currently talking about what libraries can do for their patrons. One librarian just shared with us the fact that a good number of her older patrons who sign up for e-mail accounts on the library computers soon forget their password. What she does is write the password down and keep each one in an envelope in her desk. (Her service population is measured in the hundreds so this is probably not practical for larger libraries.)