Thanks to Scott Mitchell's post today - Stopping Comment Spam in .Text using Triggers, I finally had the nerve to pull the trigger (pun intended) and implement this: Preventing .Text Blog Spam using Triggers.
From my initial testing it looks to work very well. I also implemented the Anti-Referral Spam trigger. If you are running a .Text blog you should check out the articles and implement the code - it will take 5 minutes to do max.
No more removing feedback citing the benefits of Ci@1i5 in the middle of the night for me !!
Now, it's probably a little dicey for me to spout the functionality of preventing it in the blog where I have implemented that functionality, but nevertheless...
(btw, I am a big Scott Mitchell fan and read each and every MSDN article he writes religiously. I have even implemented some his code before - specifically his RSS feed code. If you don't subscribe to Scott's blog - you should.)