As with every other blog that I have ever hosted, I seem to be the target of comment spam. In the past, I have implemented CAPTCHA images, forcing previews, and filters, all of which worked exceptionally well. With WordPress, however, I can catch all comments in moderation to require approval first. This was working fairly well, until I started wading through 17-20 spam comments per day. Apparently, there isn't a built in spam manager for WordPress. Thankfully, I have the ability to install plugins.
After downloading, installing and activating, I am impressed. First off, it scanned all of the PHP files in my theme to make sure it was compatible with the markup. Next, it noticed all the previous 80+ messages that I had marked as spam using the built in WordPress feature. For starters, I am impressed. Looking deeper into the plugin, I notice that I have the ability to change the strength of of SpamKarma for every comment posted. It offers many other features such as blacklists,
Basically, if you are a WordPress blog user, and your blog has been up for a decent amount of time (at least long enough to receive comment spam), you shouldn't be using your blog without it. Just in the time writing this post, it has already caught 5 comment spam messages, and I didn't have to worry about a thing.