comment spam
The comment spam on my blog was increasing and starting to get out of hand. It’s really irritating having to delete those comments one by one and have them come back again the next day, even after putting comments from certain IPs under moderation.
Will provided a solution that seems to have solved my problems for now. For those who want to try it, just place the following code into your .htaccess file.
RewriteCond %{HTTP_REFERER} ^http://12.163.72.13
RewriteRule ^(.*) /asshole-bot
Wordpress users may also want to try this Auto Close Comments plugin to close off comments from posts of a specified number of days old.

Valerie. 22.