does putting the CAPTCHA prevent wild inscriptions
I also use the Spam Login Filter plugin. I believe this plugin prevents most spammers from registering (you need a StopForumSpam acount to be able to report spammers if they ever get through and you should definitely report any spammers to prevent them from returning and also to help other site owners). The Captcha plugin might just be a little additional help. But I can't say for sure because I have no statistics about failed account creation attempts of spammers due to the captchas.
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