If you install the NoSpam! modification, you can have one question (no need to make your legitimate registrations jump though hoops) but you can have it rotate through them AND use ReCAPTCHA at the same time. As I mentioned in another thread just a second ago, it's also useful in that you can add multiple questions in bulk, not one at a time. I have quite a few questions now, and I add more every now and again to keep things fresh and the bots guessing.
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