I think it's a good idea, and would work, but it needs some work. I think it would be better if it were adopted by an international organization, like the UN. The US can only control what happens inside the US.

As for enforcement, I don't think it would much of an issue; if the bill were to pass, all you would have to do is complain, and I'm sure there would be plenty of contacts avalible should a complaint arise. The ip of the email would, in most cases be tracible, and... busted!

The possible security risks of spam to a user are more of a concern than the free speech of a corporation that has many other means and media to advertise. Their free speech isn't being totaly overlooked; people can still opt in for email lists and newsletters, should they choose to.

I also think email users must take an initiative to prevent Spammers from getting their email addresses.

Finally, I think that if the anti-telemarketer list can work, this could work.

-Julien