To be fair, the phone is as secure as a user makes it. If someone gets your phone them they'd likely also have access to all of your emails, contact settings, etc. Those who want to avoid that can easily set a pin/password/pattern/face unlock.
In fact, ICS goes as far as to include an option to put your CUSTOMISABLE contact info on the lock screen.
Sorry, but if google has failed to to provide adequate security for 2 decades, why continue to support them??