Sir-Uli

This plugin provides a possibility to block comments based on words of a predefined list. The built-in lists of wordpress only allow to send comments to the moderation- or to the spam-queue but not to block them completely. This is remedied with this plugin, which allows to block comments based on a definable list.
Attention #1: Use wordlist with care, there is no logging of the blocked comments!
Attention #2: It will also match inside words, so “press” will match “WordPress” as well!

WU – Block comments

This plugin provides a possibility to block comments based on words of a predefined list.

Iweblab

Segnalando un commento come spam, il nostro plugin bloccherà il commento ed eviterà che possa ritornare nuovamente. 
Questo plugin lavora e funziona solo sui servizi hosting di Iweblab.it
<h3>Support</h3>
Per informazioni e supporto, per favore apri un ticket nella tua area personale (<a href="https://hosting.iweblab.it/submitticket.php?step=2&deptid=3" rel="nofollow ugc">clicca qui per aprirla</a>) o scrivici su supporto@iweblab.it .

Block Spam Comment

Questo plugin ci aiuta a bloccare i commenti che vengono segnalati come spam dagli utenti

WU – Block comments vs Block Spam Comment