Check your Registration Logs:
ACP > Tools > Registration Logs
It prevents them (if SFS match is found) from registering, as you say, in the first place.Does SFS prevent them from registering or what does it do exactly?
There have been no new "spam threads" since I enabled it but I would like to prevent spammers from even registering in the first place if possible.
Stick with XenUtiles plus something like either:Also, when I use a Q&A captcha
a) KeyCAPTCHA: http://xenforo.com/community/threads/keycaptcha-interactive-captcha.35704 or
b) Solve Media: http://xenforo.com/community/threads/solve-media.36205