If you feel the data has value, then put them in your safe too?
Adding a password is a fine idea but you can't imagine how often I've seen people lose the password and we have to pay hundreds to places like www.lostpassword.com
I've been backing up my data files on CDs and currently they're pretty much an open book - if anyone found a cd and put it into their computer, all my data would be there on display. For future backups, does anyone out there know of a freeware app that allows you to password protect a cd, before you're able to access files? I currently use Drag'n Drop CD.