This doesn't answer you question, but I was just reading this today in Canadian news, and got a chuckle our of this quote:
"Robillard cites an American law aimed at curbing spam that came into force in January. She says it has been perceived to be somewhat effective."
You could have fooled me.
Link to the complete article if interested. http://www.cbc.ca/stories/2004/02/04/Consumers/spam040204
Starkeeper