Create your own profanity and spam blocker https://www.jreviews.com/blog/create-your-own-profanity-and-spam-blocker

antispam_filter.php

 <?php
defined('MVC_FRAMEWORK') or die;

function antispam_filter($validation, $params)
{
  $files = glob(__DIR__.DS.'spamlists/*.conf');

  $list = '';
  
  foreach ($files as $file)
  {
    $list .= file_get_contents($file)."\n";
  }

  $list = preg_split("/((\r?\n)|(\r\n?))/", $list, NULL, PREG_SPLIT_NO_EMPTY);  

  $text = strip_tags(implode(' ',S2Array::flatten($params['data'])));

  $badWords = [];

  $context = [];
    
  foreach ($list as $regex) 
  {
      $regex = preg_replace('/(^\s+|\s+$|\s*#.*$)/i', "", $regex);

      if (empty($regex)) continue;

      $match = preg_match('/(?:[^ ]+|(?:[^ ]+ )){0,1}('.$regex.')(?: [^ ]+){0,1}/i',$text,$matches);

      // Blocked word found
      if ($match)
      {
        $badWords[$matches[1]] = $matches[1];
        $context[$matches[0]] = $matches[0];
      }

  }

  if ( !empty($badWords) ) 
  {
    // $validation[] = 'Your message doesn\'t comply with our submission guidelines';
  
    $validation[] = 'Your message doesn\'t comply with our submission guidelines. The following words are not allowed and need to be removed before your submission is accepted: <strong>'.implode(', ',$badWords).'</strong>';

    antispam_filter_log($context);
  }

  return $validation;
}

function antispam_filter_log($words)  
{  
    $datetime = '['.date('D Y-m-d h:i:s A').'] [IP '.$_SERVER['REMOTE_ADDR'].'] ';  
   
    $entry = $datetime;

    foreach ( $words as $word )
    {
      $entry .= $word."\r\n";
    }
    
    $filename = 'spamlog_'.date('Ymd').'.txt';  

    $filepath = __DIR__; // Current directory
    
    $handle = fopen($filepath.DS.$filename,'a+');  
    
    fwrite($handle,$entry);  
    
    fclose($handle);  
}  
 
Clickfwd\Hook\Filter::add('listing_submit_validation', 'antispam_filter', 10);
Clickfwd\Hook\Filter::add('inquiry_submit_validation', 'antispam_filter', 10);
Clickfwd\Hook\Filter::add('review_submit_validation', 'antispam_filter', 10);
Clickfwd\Hook\Filter::add('discussion_submit_validation', 'antispam_filter', 10);
Clickfwd\Hook\Filter::add('owner_reply_submit_validation', 'antispam_filter', 10);
Clickfwd\Hook\Filter::add('report_submit_validation', 'antispam_filter', 10);
Clickfwd\Hook\Filter::add('claim_submit_validation', 'antispam_filter', 10);
Clickfwd\Hook\Filter::add('resources_submit_validation', 'antispam_filter', 10);

badwords.conf

# Profanity

word1
word2
A profanity phrase

# Spam

spam1
spam2
A spam phrase

filter_functions.php

<?php
defined('MVC_FRAMEWORK') or die;

/**
* Using require as shown below instead of pasting the filter code in this file allows for better origanization
* of your developer filters
*/

require_once 'antispam_filter.php';

Follow the instructions in the How to create your own profanity and spam blocker blog post to use these files.