Google Captcha is dystopian. It's genuinely dehumanizing. I can't tell you the number of captchas I've failed in the past few days. A robot would have an easier time solving it.
Discussion
A robot doesn't get nervous about potentially being denied access.
How do you know failing isn’t the way you’re proving you’re human? Actually you’re probably failing because you’ve got your browser and computer locked down to protect your privacy. Mostly those captchas are using other data than the actual puzzel to determine if you’re a bot.