So Google decided to make all public calendars searcheable - great idea, except people are used to the default behaviour of offline personal calendars that keep your data inaccessible. It turns out that people like to keep information like usernames and passwords in their event reminders. Even though Google informed them of the implications of making their calendars public with an in-your-face dialog box, the pre-existing paradigm of closed, inaccessible data is still firmly entrenched in people's minds.