In my experience people still are a little ignorant in matters concerning their privacy. Not to mention the privacy of their customers or clients.
Wouldn't it be a relieve to secure emails that consist sensitive data? We could use some sort of cryptography in emails that contain client-data. I was looking at http://www.gpg4win.org/about.html. They have a plugin for MS-outlook. Maybe it could be implemented in the email-module as well?