Comments:

Requirement of the use of suppression lists will seriously damage many of the legitimate publications available on the net. My specific concern is for harm to publishers who require permission from the consumer prior to adding them to any list. They're not who CAN-SPAM was designed to put out of business, but this requirement will very likely have that effect. There's also the potential for significant harm to consumers, because of the problem of properly knowing their intent when they unsubscribe from a list. On top of that, these suppression lists could easily fall into the hands of spammers, leading to more spam instead of less.