> users take unreasonable precautions
It doesn't help that so far the communicators have used the wrong analogy. Most people writing on this topic use "injection" a la SQL injection to describe these things. I think a more apt comparison would be phishing attacks.
Imagine spawning a grandma to fix your files, and then read the e-mails and sort them by category. You might end up with a few payments to a nigerian prince, because he sounded so sweet.