Their site design seems to attempt to essentially cause would be spammers to have their resources tied up in a loop. Essentially an "attack" if you will. Your pretty much at their mercy.
Your only course of action is to follow this link in an attempt to get "delisted":
www.spamcannibal.org
Then click "contact" and follow the directions.
In theory you can only get on their list by spamming their servers unfortunately there are a lot of unintentional ways that that can happen. Once your on the list you pretty much have 2 options short of changing your addressing information which are beg and plead.
I'm curious how if what they are doing could be considered a malicious and damaging to your private property in a court of law. Essentially the goal of their program is to "Crash or Slow" a server. (in their words I might add)
DDOS attacks are only illegal because is an attempt to make a computer resource unavailable to its intended users and I do not see how this is any different. If begging and pleading doesn't work you can always send them a
Nuisance Notice of detinue legal threat (which basically means your notifying them that if they don't remove the IP you will be attempting to reclaim damages for lost property/revenue because of their Tortious interference on the detained good which was your bandwidth). Generally this type of threat is called a cease and desist letter and they generally work quite nicely.
Example:
(
www.einvestigator.com/investigation_arti...nd_desist_letter.htm)