You can bet SpamHaus , SpamCop, SPEWS and anti-spam software vendors will LOVE the US I-CAN-SPAM law.
Since it is illegal to hide behind proxies, forged headers and since you have to LABEL porn/adult SPAM and include a VALID company mailing address, spamming scumbags and their hosts will be blacklisted, tracked and blocked quite easily. The hosts that decide to take spammer money will find themselves on their own intranet.
I suggest all those whose want to scrub their email and route the crap to the trash where it belongs .... check out
http://spampal.org for a great freeware filter that uses all the blocklists and Regex filter COMBINED.
