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I'm okay with captchas especially the ReCaptcha ones that I find to be easily readable. However sites use other ones that I find impossible to read, with the numbers and letters squished into an indistinguishable mess. I've had captchas that I've gotten wrong more than 5 times. That is nuts.
As someone who has run websites with commenting features, captchas are a necessary evil to keeping your site from being overrun with spam. We were even forced to put them onto our "Contact Us" page, because we were getting hundreds of spam emails a day, obviously computer generated and entered.
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