The lands of the rising spam

Port 25 blocking is increasingly being used by ISPs around the world to combat the problem of spam.
Too bad it is a little bit too late.
We have a saying in Italy "closing the door when the cows are gone..."
Senders of unsolicited commercial e-mail are resorting to outright criminality in their efforts to conceal the source of their ill-sent missives, using Trojan horses to turn the computers of innocent netizens into secret spam zombies.
Trojan horses generally rely on their wielder's ability to trick innocent people into executing them.
"As a general rule it's legal to send someone an e-mail even if they don't want it, but once you break into their computer and get their computer to send e-mail to someone else, then you're violating federal and state computer crime laws."
Everybody agrees with this, but is somebody going to do something about it?