Comments:

The Do Not Email registry is a built-in mailing list for any International spammer. If you implement it, you should be selling it to help balance the budget. CAN-SPAM is flawed in that it presumes that people actually want junk email. You need to rewrite it so that the presumption is that people DO NOT WANT SPAM. I don't want to opt-out... I don't want to see nor hear from these people unless I tell them so. That should be a simple-enough premist so that even our Congress can understand it. An alternative may be to charge the sender to equivalent of bulk mail rates for sending spam and help balance the budget. In case you need further help, these rates are published by the U.S.Postal Service (the folks who deliver your snail mail) and a free copy is available at your friendly, local post office.