analogy is putting your christmas presents in the trunk rather than lay them out on your front seat when you park your car... which is more likely to result in having them stolen?
... very simply, you can add as many layers of security as you feel necessary to keep your private information private.
a wise security advisor once told me: "if a thief wants to get in... he will. the trick is to make it hard enough for him that he goes elsewhere."
... that's sort of the reasoning behind putting a security sign or "beware of dog" sign in your front yard even though you have neither a security system nor 