Except for being too verbose in an e-mail, I think E-mail disclaimers are pretty funny.
I got another one today.
This e-mail and any attachments may contain confidential and privileged information. If you are not the intended recipient, please notify the sender immediately by return e-mail, delete this e-mail and destroy any copies. Any dissemination or use of this information by a person other than the intended recipient is unauthorized and may be illegal.
I say: of course I’m the intended recipient of that mail: it was sent to my address 🙂
If it is that confidential, double check the recipient.
And don’t use e-mail to start with. You never know through which servers your confidential mail was sent.