a modification if you use captcha with this plugin and you want to deter spammers more effectively

peregrine

if you also want discovery text (why do you want to join). with captcha in vanilla 2.0.18.x

in BotStop/views/registercapcha.php

change this

     <li>
         <?php
            echo $this->Form->CheckBox('TermsOfService', $TermsOfServiceText, array('value' => '1'));

to

          </li>

          <?php
                echo $this->Form->Label('Why do you want to join?', 'DiscoveryText');
                echo $this->Form->TextBox('DiscoveryText', array('MultiLine' => TRUE, 'Wrap' => TRUE));
             ?>
          </li>  

         <li>
         <?php
            echo $this->Form->CheckBox('TermsOfService', $TermsOfServiceText, array('value' => '1'));

then you can also use this plugin more effectively with captcha authentication method.

http://vanillaforums.org/addon/registrationrestrictlogger-plugin