Preetinder Singh left a great little tip in my article 10 Simple Steps To Reduce WordPress Comment Spam Without Using Plugins that I thought I’d share with you all.
Preetinder found that by simply renaming wp-comments-post.php to something else you can reduce a huge amount of comment spam. All you then need to do change the form url from wp-comments-post.php to the new file name in your comments.php file. It’s amazing how simple little tweaks like this can save you a lot of problems.
If your blog is experiencing a lot of comment spam, I recommend trying this out. Thanks to Preetinder for the tip :)