gregsurname

This WPMU plugin creates under the Site Admin menu called “Bulk Create Blogs” where you can bulk create/add users to blogs.
To use the plugin you must create correctly formatted data. The plugin takes 
CSV formatted data where each row contains the following data.
<pre><code>domain, user_id, blog_title, blog_topic,
</code></pre>
Each of these fields is described below.
<ul>
<li>blog_domain (Mandatory): the domain name of the blog, this should only contain alphanumeric characters and be in all lowercase. If the blog domain is empty then users will be added to the site’s root blog.</li>
<li>user_name (Mandatory): the login id of the user to be added to the blog.</li>
<li>blog_title (Optional): the title of the blog.</li>
<li>blog_topic (Optional): the name of the blog topic that this blog will be categorised under. These topics are setup under the ‘Blog Topic Management’ tab. A blog_title must be chosen if you wish to set the blog topic. (Requires cets_blog_topics plugin.) </li>
</ul>
When each line is processed, if the blog named already exists then the user given 
is added to the blog. If the blog does not exist then it is created. If a blog title 
is not provided then the blog domain is used.
This plugin also provides support for LDAP user creation. If a user does not exist and 
the ldap_auth plugin is installed then it will attempt to create a new user.
At the moment this plugin only supports sites that use domain blog naming. Support for 
sub-directories is not planned but you could easily add it yourself.
The number of blogs that can be imported at a time is limited.

Bulk Create Blogs

A WPMU plugin for allowing the site admin to bulk create blogs using CSV data.

Ipstenu (Mika Epstein)

We’ve all had this problem: a group of spammers from <code>mail.ru</code> are registering to your blog, but you want to keep registration open. How do you kill the spammers without bothering your clientele? While you could edit your theme’s <code>functions.php</code> and block the domain, once you get past a few bad eggs, you have to escalate.
Ban Hammer helps you do that by preventing unwanted users from registering.
On a single install of WordPress, instead of using its own database table, Ban Hammer pulls from your list of prohibited emails from the Disallowed Comment Keys feature, native to WordPress. Since emails never equal IP addresses, it simply skips over and ignores them.
On a network instance, there’s a network wide setting for banned emails and domains. This means you only have one place to update and maintain your blocked list. When a listed user attempts to register, they get a customizable message that they cannot register.
For advanced documentation, including how to use on WooCommerce, please visit <a href="https://github.com/Ipstenu/ban-hammer/wiki" rel="nofollow ugc">the Ban Hammer Wiki</a>.
<ul>
<li><a href="https://github.com/Ipstenu/ban-hammer/" rel="nofollow ugc">Development</a></li>
<li><a href="https://github.com/Ipstenu/ban-hammer/wiki" rel="nofollow ugc">Wiki</a></li>
<li><a href="https://ko-fi.com/A236CEN/" rel="nofollow ugc">Donate</a></li>
</ul>
<h4>Privacy Policy</h4>
This plugin does not track data outside of what WordPress already collects. It utilizes the submitted email address to validate the domain and compares it to the list of prohibited domains and emails. No additional data is processed.
<h4>Credits</h4>
Ban Hammer is a very weird fork of <a href="http://www.joeswebtools.com/wordpress-plugins/no-disposable-email/" rel="nofollow ugc">Philippe Paquet’s No Disposable Email plugin</a>. The original plugin was a straight forward .dat file that listed all the bad emails (generally ones like mailinator that are disposable) and while Ban Hammer doesn’t do that, this would not have been possible without that which was done before.
Many thanks are due to WP-Deadbolt, for making me think about SQL and TTC for StopForumSpam integration. MASSIVE credit to Travis Hamera for the StopForumSpam/cURL fix! And then props to Helen Hou-Sandí for not using curl at all. Protip? Use <a href="http://planetozh.com/blog/2009/08/how-to-make-http-requests-with-wordpress/" rel="nofollow ugc">WP_http</a> instead!

Ban Hammer

Prevent people from registering via your disallowed comment keys.

Bulk Create Blogs vs Ban Hammer