FTC says NO to Do Not Email List

Although authorized by the (YOU)CanSPAM act to create a national email list, the Federal Trade Commission has declined to do so according to news.com. The article quotes commission members as saying such a list would be ineffective and burdensome to the consumer.
Instead the highlighted two emerging mail authentication technologies SPF and Domain Keys as like effective weapons in the anti-spam battle.
I tend to agree with this assessment. Unless your mailbox is already hopelessly over run with spam and cant get any worse, I would never risk giving out my email address to an anti-spam list.