I decided to try this mod after having to run the spam cleaner on 3 spammers today. There seems to be a problem with it now used with XenForo 1.1.0 final. Just tried registering using details I knew would get rejected by SFS to test it out, I got this error shown below.
Fatal error: Call to undefined function http_get() in /home/xxxxx/public_html/library/StopForumSpam/ControllerPublic/Register.php on line 84
I was using an API key with it set to submit spammers into database
Just a note on development. This plugin will no longer be updated, as its code is being rolled into another add-on in development. Any features slated for v1.1/v2 will be released with the other add-on.