[Timesink]

Even a hardcore Libertarian could not object to anti-spam legislation that permitted anyone to send anything they want, but only if they identify unsolicited bulk mailings with a code in then header to enable filtering. A simple requirement to provide accurate consumer information.

Wouldn't work. They'd just move their servers to Canada or the Caribbean.

The only solution that would even slightly work would be to extend the "junk fax" law to cover spam as well. That would, of course, have the same problem as your suggestion, but at least it would FORCE the people involved to move out of the US or face unlimited class-action lawsuits, and also force (if written correctly) all major Net backbones to cut off access to the IP addresses of all spammers no matter where in the world they come from.

[dinodino]

That wouldn't work either. There are tons of junk fax operators working out of the U.S. I get a number of them a week on my office fax, despite the fact that they are illegal in most States.