The Spammer's Takeout, a group that has dedicated their lives to combating spammers and crackers.
They offer free security on forums, and train hackers to work for them(free of course).
The main goal of The Spammer's Takeout, is to show the world that hackers are the good guys and the crackers are the bad ones. They have a lot of stuff in the Anti-Spam Resources, they even show how you can prevent your forums from being cracked.
If someone keeps spamming your forum, The Spammer's Takeout will protect your forum, and stop the spammer. Mabye even get him put in jail.