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How can i prevent or blacklist a list of usernames that i don't want users to register with?

And can I add a message if they try to register with one of those names that says 'this username has been reserved'

Is this possible?

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up vote 4 down vote accepted

Yes there are plugins that do this, for example, http://wordpress.org/extend/plugins/restrict-usernames/

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woo, thanks so much – Jack Stewart Oct 30 '11 at 6:58

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