The funniest disclaimer I ever read: From Virgin Mobile
Disclaimer: This email, and any files attached to it, should be treated as totally top secret between the sender and the addressed recipient/s. If you are reading this but think that you probably shouldn't be, please delete this email, dispose of any printed copies & agree that we'll never mention it again. We've done our best to scan this email for any nasty viruses, but what with technology and all, we can't absolutely guarantee it. Why are you reading disclaimers anyway?