Many of us do not allow our visitors to register for new accounts on our sites. It could be a major security headache if you do not take time to track the activities in your community and remove abusive users. If you happen to have an open community using WordPress, there is no reason not to restrict the usernames your visitors can use to register for an account on your site. Why would you want to do that? Maybe you want to keep your visitors from using foul language in their usernames. In some cases, you want to keep people from using branded terms to register for your community.
Restrict Usernames is a simple plugin that gives you the opportunity to gain control over the type of names your visitors can register on your website. You can restrict full or partial names. You can also require your members to have a specific substring in their usernames.
Restrict Usernames is not only easy to use, it does give you some flexibility handling usernames submitted to your website. For example, you can forbid your visitors from using space in their names with a click on a checkbox. It gives you an easy way to exert more control on usernames used in your community.