Do you guys want to combat spam, which you get into your blog , i.e. Wordpress blog then you need to check following things like

1. IP address of the Spammer
2. Refferer Agent
3. Domain Names

When your site would not be visible to the spammer’s then who would comment on the your site. I have started using some tricks to combat spam and those who want to combat spam like me , comment on my site and I will surely give you my tricks.  But if your computer get’s a 403 Error then it’s possible that you are on the Spam List.