In Search Of The Perfect CAPTCHA | Smashing Coding - 0 views
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Try the honeypot method or another that is invisible to users. Some could potentially be bypassed, but their presence is often enough to thwart automated efforts.
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Vernon Fowler on 29 Apr 13Honeypot for BuddyPress registration didn't work for me at all. There's no random element in the field ID and the checkbox can easily be brute forced (there's only 2 possibilities!).
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