There's probably a database out there of everyone's mother's maiden name. :-(
I still think a kiosk-friendly way of updating a user's login would be useful. Though if we all start dragging around USB Flash drives with [link|http://www.oreillynet.com/pub/wlg/5964|knoppix.sh] then even that might be moot (assuming the kiosk has a USB socket).
Cheers,
Scott.