An anonymous reader writes "As those of us who have to deal with transactional email know, you have to provide a method to unsubscribe when sending email to comply with the CAN-SPAM act. However, this requirement makes it far too easy for, lets say, a competitor to find your unsubscribe page/address and bomb it with requests to unsubscribe everyone on their own mailing lists. Have you ever had this problem? How do you deal with this?"
"Anyone attempting to generate random numbers by deterministic means is, of
course, living in a state of sin."
-- John Von Neumann