Google Desktop Search: Security Threat?

Today @ PC World – Google Desktop Search: Security Threat?
Google Desktop Search might just be too good. Using the new software, I was able to bypass user names and passwords that secure Web-based e-mail programs and view personal messages sent and received on public PCs.
Using Google’s new software on a shared computer at the Google booth at the Digital Life trade show floor I was able to easily search for, find, and read private Yahoo e-mail sent on the computer by previous users earlier in the day.
Marissa Mayer, Google’s director of consumer Web products, told me she wasn’t surprised. “This is not a bug, rather a feature,” she says. Google always intended people to be able to index and search Web-based e-mail viewed and composed on PC, she says. Google Desktop Search is not intended to be used on computers that are shared with more than one person, she says.