I read a story that some guy did a test - he made a script which sent an e-mail message back to him. He attached the script to a message and sent it to a hundred co-workers with the message that said VIRUS ATTACHED - DO NOT OPEN THE ATTACHMENT.
He got something like 60 messages back.
Doubtless they didn't even bother to read the subject before opening or previewing the attachment. The human is the weakest link.
You b@st@rd!