internet - Spam under attack

Four Internet providers, America Online, Earthlink, Yahoo and Microsoft are suing hundreds of spammers, people and companies who send unsolicited mails, report the New York Times. It is about time!
They use a fairly recently US law that has been qualified by experts as fully inadequate.
Chinese internet providers have often been accussed of sending much of the spam, although in most cases the spam inself has an US origine.
Some telecommunication companies like China Telecom have taken generic action, by stopping users from sending more than 30 emails in one batch, but in that why they mainly hurt legitimate senders while spammers find easy an alternative.