Spamfighting

I got an email from Garth advising me that he had been blocked from commenting on my blog. It turns out that he had used the word socialist, which was blocked by the text string "cialis" in the Blacklist. Cialis is some kind of drug or herbal - I don't know what it is but it has been promoted through blog spam. I have been using a combination of MT-Blacklist, SpamLookup and MT-Keystrokes. I have cut out a lot of stale URL's from MTB, but I still run it to screen for proven text strings found in spam relating to gambling, porn, drugs. SpamLookup and Keystrokes have been pretty effective. I think they basically take care of everything, but there is some question about server load running SpamLookup under a moderate spam attack. MTB intercepts incoming comments first.