] "Here goes: So (a) if a law like the one I propose is
] passed on a national level, and (b) it does not
] substantially reduce the level of spam, then (c) I will
] resign my job. I get to decide whether (a) is true;
] Declan can decide whether (b) is true."

Good Lord! If (a) is true then Lessig will be on the street! Any notion that a tagging law is going to reduce the number of emails you receive from compromised servers in Korea is just downright silly. These people are already commiting computer fraud. Whats a little fine going to mean to them? IF we had the ability to enforce the anti-fraud laws internationally THEN you might consider something like this, but right now we need to start by prosecuting people who hack websites in other countries.