Today, I browsed the Top 'page not found' errors page in my blog so I can setup some redirections. Two of those entries are very unusual.

The wp-comments-post.php is a file usually used in wordpress to submit a comment, it's common someone will access that script, but it is uncommon to access it directly since that page does not make sense to humans.

The other one features "/phpbb". spambot mistake that as where phpbb is installed. That post is 5 months old and not popular posts, it's only logic to assume spambot is the one that views that page.

That's pretty much explains why there is so little spam in my site now(I didn't even implement CAPTCHA!) , the spambots that visit my site are mostly ones made to target wordpress and phpbb. Glad I made the switch :)