A Simple trivial solution to that stupid spam bot problem.

Do this

Notice which THEME YOU ARE USING .
Check using the Presentation tab of your WP-Admin

Go to the /wp-content/themes/ThemeYouAreUsing/
Edit Comments.php [File manager in CPANEL will allow you to do that]

Find /wp-comments-post.php

Rename it to something you like, say human-comment.php

Save it!Upload it.
If your site uses a Comment Popup, edit that one too! Same thing applies

Then go to / directory and rename the wp-comments-post.php to the thing you renamed it to be …for me human-content.php

Now…test it
type http://azrin.net/wp-comments-post.php in yr URL (use yr own url )

you must get a 404 error!

then see if the spammers still get to you!

No need edit htaccess or what not! And no need for Akismet too! Headaches!