Spammers WILL stop. Nobody doubts that. The only question is whether they will do so before or after destroying the net, like any other parasite that dies after killing its host. Spammers are, in fact, the single largest threat to freedom of speech on this, the greatest two-way communications medium ever invented. That last lie has led to several divorces, several firings, and at least one suicide.
Lies have consequences.
My on-line mailbox can hold a maximum of 50 email messages. By invading my mailbox with unsolicited advertising, the spammers are capable of depriving me of the email I desire receiving.