How can we fight spamming on a legal level?

How to reduce Spam …

Until the day that rigorous regulations are in place to stanch the flow of unsolicited e-mail by dubious sources, the most efficient means of avoiding spam is undoubtedly through a mail filter that places all e-mail resembling spam in quarantine.
MailCleaner meets that demand. You will find Acrobat information about MailCleaner here.