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The false negative rate may be very low, this doesn't speak to the false postive rate. Considering the goal was supposed to be "telling humans and computers apa
by syrrim 8y ago
The false negative rate may be very low, this doesn't speak to the false postive rate. Considering the goal was supposed to be "telling humans and computers apart" both kinds of errors are important to consider. Google predicates their captcha primarily on the logged-in user's activity around the web, failing that they use the ip. A human being not logged in and using an open proxy is likely to get shut out completely. It ceases to be a captcha, in the traditional sense, at that point. This may be a good thing, depending on your standpoint.
- hombre_fatal 8y agoSure, but that should be a chilling reminder of how bad abuse is on the internet. Obviously it comes with downsides, but it's a trade-off. Nobody uses Recaptcha for fun. As I reminded a sibling comment, even HN uses Recaptcha on its login/register page. There's no telling how many fewer spambots we have to deal with every day because of it, yet we're somehow here discussing whether Recaptcha servers a purpose while profiting from it. :)