The Korean Government is launching a site where you can register your email address and then any Korean email marketers who send you unsolicited bulk mail will face stiff fines. I think this is a much easier way to deal with it than the right to remove yourself from every spam list that you are on- the approach taken by the U.S. government. You will only have to register once. And then it is up to the marketers to check if you are on that list or not.
In concept this is similiar to the 'postal nixie' list that Direct Marketers need to observe to get postal discounts. To qualify any addresses found on the postal nixie file must be eliminated.
There is a weakness here though. The Korean government can only require it of emailings done from Korea. In the US, the bulk of the spam emails are coming from outside the US. So setting up such a system would not cover the largest amount of spam.