Jane-SU
New member
Well, you can use other forms of captcha... a couple of them are available in the resource section. I know not all of them are foolproof but something is better than nothing
http://xenforo.com/community/resources/are-you-a-human-spam-combat.1011/
http://xenforo.com/community/resources/sonnb-stop-spam-here-fspamlist-api.1108/
http://xenforo.com/community/resources/sonnb-stop-spam-here-spambusted-api.1107/
http://xenforo.com/community/resources/sonnb-stop-spam-here-botscout-api.1106/
http://xenforo.com/community/resources/sonnb-stop-spam-here-stop-forum-spam-api.1092/
http://xenforo.com/community/resources/sonnb-stop-spam-here.1086/
http://www.cloudflare.com
This is what has proven to work for us