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One thing I find works really well is context-based question captchas. You ask human visitors some very simple question about your site, and unless the robot br
by tyteen4a03 9y ago
One thing I find works really well is context-based question captchas. You ask human visitors some very simple question about your site, and unless the robot brute-force, it's very hard for robot spammers to get it right.
- JorgeGT 9y agoYep, I saw this in rtl-sdr.com! They ask, for instance what does the S in SDR stands for, which obviously any legitimate commenter in such a niche site knows.