Bad Behavior: Yours or Mine

I noticed at the bottom of the blog recommended by Dr. Howland today that it utilized Bad Behavior to block "spam" comments. I thought this was interesting because I have already had a "spam" comment in my blog. I clicked on Bad Behavior referenced at the bottom of her blog page.

http://www.homelandstupidity.us/software/bad-behavior/

Bad Behavior is a set of PHP scripts which prevents spambots from accessing your site by analyzing their actual HTTP requests and comparing them to profiles from known spambots. It goes far beyond User-Agent and Referer, however. Bad Behavior is available for several PHP-based software packages, and also can be integrated in seconds into any PHP script.
Contents
I don’t like spam! (Introduction - this page)

Download
FAQ
Installation and Usage

I don’t like spam!
The problem: Spammers run automated scripts which read everything on your web site, harvest email addresses, and if you have a blog, forum or wiki, will post spam directly to your site. They also put false referrers in your server log trying to get their links posted through your stats page.
As the operator of a Web site, this can cause you several problems. First, the spammers are wasting your bandwidth, which you may well be paying for. Second, they are posting comments to any form they can find, filling your web site with unwanted (and unpaid!) ads for their products. Last but not least, they harvest any email addresses they can find and sell those to other spammers, who fill your inbox with more unwanted ads.

I would utilize a program like this. Wish it was available for my telephone to block the political ads this fall.