hedwards: I miss Blue Frog. They'd issue one collective do not spam message to the owner of the domain, then if that didn't result in action they'd issue one opt out per email that they sent, usually knocking the spammers offline in the process.
The program was working, but ultimately they folded anyways.
Magnitus: The problem with strong anti-spam measures taken against the company the spam is for is this:
If companies know that anyone who spams will get it good (either by the law or by some third party vigilante), then you'll see cases where a company's competition will spam for them just to put them in hot water.
What you really want to do is find some way to take it out on the spammer himself.
They didn't take it out against the company whom the spam is for, they reported the spam to the abuse contact for the domain name.
And ultimately, going after the spammers is the least reliable way of doing it. You go after the advertised products because ultimately, they're the ones that are driving the thing. Spammers don't typically spam as a hobby.