codicone

The whitelist/blacklist plugin gives you a strong layer of security for your website because not only does the plugin limits unauthorized user access to your site but also creates a log. The log helps to create new blacklist entries. The increase in your blacklist entries means a decrease in spam and security threats. So it is a great safety measure to start with.
It is a very handy plugin that you can add to your WordPress site for added security. It helps you to tailor your preferences about which email addresses you want to allow for registration on your site.
You can create a list of all email addresses or email domains that you wish to receive registrations. On the other hand, you can add a list for blacklist domains to not allow any registration from specific domains. Blacklisting is time-saving because most of the time you have already figured where the spam comes from. So you close those doors already. It is relatively safe also because you are not risking anything prospective.
<h4>Compatible With</h4>
<ul>
<li>WooCommerce</li>
<li>bbpress</li>
<li>buddypress</li>
<li>Profile Builder</li>
<li>WP User Frontend</li>
<li>User Registration</li>
<li>Ultimate member</li>
</ul>

Blacklist & Whitelist Domains for Registration

The whitelist/blacklist plugin gives you a strong layer of security for your website because not only does the plugin limits unauthorized user access  …

antonchanning

This plugin is designed to safely allow bbcode shortcodes and other 
safe shortcodes to be embedded in bbpress topics and replies and also 
blog comments. You don’t wan’t users entering shortcodes such as 
[bbp-login] in the middle of their reply.
It doesn’t actually implement the shortcodes though, 
for that you need a separate plugin. I recommend my own bbPress2 
BBCode plugin, as this is fully whitelist aware, in that it also 
parses the contents of the shortcodes, so [b][bbp-login][/b] also 
gets parsed for safety. Something that doesn’t happen with non 
whitelist aware shortcode plugins.

bbPress2 shortcode whitelist

Still working

This plugin adds creates a whitelist of shortcode tags that can be applied to comments, bbPress and BuddyPress.

Blacklist & Whitelist Domains for Registration vs bbPress2 shortcode whitelist