Comment by notpushkin

I'd say you're too pedantic. Given both computer work (calculating hashes) and human labor (filling out reCAPTCHA) have a price point, it is only a matter of making automated actions more expensive to scale. It's only natural then that the word definition has shifted.

Let's just declare that captcha now stands for Completely Automated Public Thingy to Make Spammers And Fraudsters Life A Bit Harder.