While doing a google search for "websense" and "evil" I stumbled across this site, The Gematriculator in which you can enter a url or chunk of text to find out if a website is good or evil. "Basically, Gematria is searching for different patterns through the text, such as the amount of words beginning with a vowel. If the amount of these matches is divisible by a certain number, such as 7 (which is said to be God's number), there is an incontestable argument that the Spirit of God is ever present in the text. Another important aspect in gematria are the numerical values of letters: A=1, B=2 ... I=9, J=10, K=20 and so on. The Gematriculator uses Finnish alphabet, in which Y is a vowel."
Seems to be about as effective and make as much sense as some of the filtering software available.