Server error 500 / http return code

[kochtopf]

Every comment that goes into spam generates a 500 server error. This is cause wp_die() defaults to 500. May I suggest the following change for the next update...
Either replace wp_die() by just die(). This defaults to http return 200 or better do something like wp_die( __( $antispam_pre_error_message . $antispam_error_message, 'anti-spam' ), 403 );. I'm still testing if 403 is better than 200 in terms of spam. Changing from 500 to 200 reduced the amount of spam by 75% (many spam scripts are sending the same comment multiple times if they get a 500).

Ah and if you are already updating... you might change $antispam_pre_error_message into a non-Javascript version. Because you get the message cause your Javascript is disabled.
I use something like:

$url = htmlspecialchars($_SERVER['HTTP_REFERER']);
$antispam_pre_error_message = "<a href='$url'>back</a>";

...and the back link does work.