I signed up with BlueSecurity because I was sick of the amount of spam I was getting. This morning when I retrieved my mail, I had 239 messages. I started looking at them and found half the messages were just meaningless blocks of prose, but the other half said this:
You are recieving this email because you are a member of BlueSecurity (http://www.bluesecurity.com).You signed up because you were expecting to recieve a lesser amount of spam, unfortunately, due to the tactics used by BlueSecurity, you will end up recieving this message, or other nonsensical spams 20-40 times more than you would normally.
How do you make it stop?
Simple, in 48 hours, and every 48 hours thereafter, we will run our current list of BlueSecurity subscribers through BlueSecurity's database, if you arent there.. you wont get this again.
We have devised a method to retrieve your address from their database, so by signing up and remaining a BlueSecurity user not only are you opening yourself up for this, you are also potentially verifying your email address through them to even more spammers, and will end up getting up even more spam as an end-result.
By signing up for bluesecurity, you are doing the exact opposite of what you want, so delete your account, and you will stop recieving this.
Why are we doing this?
Its simple, we dont want to, but BlueSecurity is forcing us. We would much rather not waste our resources and send you these useless mails.
Its simple, we dont want to, but BlueSecurity is forcing us. We would much rather not waste our resources and send you these useless mails, but do not believe for one second that we will stop this tirade of emails if you choose to stay with BlueSecurity.
Just remember one thing when you read this, we didnt do this to you, BlueSecurity did.If BlueSecurity decides to play fair, we will do the same.
Just remove yourself from BlueSecurity, and make it easier on you.
Message to the spammer: NO. I will not remove myself from BlueSecurity. I will not give in to your demands, and I will not stop fighting back against you. Sending me this burst of mail does not lessen my desire to fight back. It only strengthens my resolve. I am heartened to see that BlueSecurity has become such an annoyance that you're trying to fight back. I hope our efforts are really hurting you.
In fact, I think more people should sign up for BlueSecurity.
Update 1 - I'm already getting more emails from this guy, so he's apparently not waiting for the 48 hours he offered. But what did I expect? He's a spammer. He's scum. Also, as Rich pointed out, the email is threat of a DDOS against BlueSecurity members, so it is something that could be handled via the law, if we could figure out who the hell he is.

What you've described, Mo, is not just mindless spamming; this is intentional antagonism and, as such, I would think that a greater accountability could be legally required.
The organization that sent you this message is not just spamming the 'net blindly -- they are TARGETING people who have taken intentional action to ESCAPE the annoyance of unsolicited junk e-mail.
I will not sign up for BlueSecurity for a couple of practical reasons:
1. The system that's spamming you is a non-entity; it doesn't care if there are one or one-billion subscribers; it's a machine and it will plod through its programming without a care in the world; giving it one more name to annoy seems to be ineffective in outcome despite being an otherwise principled stand.
2. Given #1, the best way to confront the PRACTICE of this spammer is to confront the PEOPLE who possess executive-level authority to continue or cease such e-harrassment; I would contact the organization and get a few names of the officers, directors, etc., and pass the beligerent email you received on to those who are REAL PEOPLE and who can be entreated to stop what's happening.
Also, if you have any lawyer-friends, I'd ask them about your situation because although I'm not a lawyer, it seems to me that the blatant malice expressed in the email you received ought to be evidence enough of harrassment and, therefore, legally addressable.
Those b~stards... care to publish the headers in that email so that some of us may have the option of getting involved? ;-)
Take care, my friend!
Update: excellent thread on this subject going on at Slashdot:
http://it.slashdot.org/article.pl?sid=06/05/02/1326228&from=rss
Enjoy!