How do I put in a Captcha for guest voting?

How do I put in a Captcha for guest voting?

SirL0lSt0rm
SirL0lSt0rm
  • SirL0lSt0rm
  • 12 months ago
So I have guest voting on. But I have some issues with trolls. I was wondering how do I put in a captcha on the guest vote. So guest have to enter a Captcha before they can submit there vote?

greetz Sirl0lSt0rm
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