If you get this issue Do this:
Buy CleanTalk plugin – good people there, very helpful.
Disable “Anyone can register” feature in WordPress admin settings.
Also you may want to restrict access via .htaccess to the WP login/register page. The bots love it and anyone can type in your domain’s WordPress registration url, every WordPress site has one. Not everybody using WordPress knows this.
Thanks for input guys! You are appreciated.