I love my XenForo, but captcha is definately not enough to keep spammers registrations, I see new ones almost everyday, please add an option to include questions and answers or something similar to avoid these. Thanks
Yeah a must. The spam killer system is great for clean up, but does nothing in terms of preventing spammers from joining. I run a board that manually approves members, and the question feature is how I can detect a potential spammer.
We use Question/answer system for our vb 3.8 site and did not have much spambot. But as much as you want, you still have to deal with human spammers who sign up, post some seemingly relevant posts and try to sneak a link here and there.