Wrong!
" CAPTCHA tests are used to separate bots from people, as many internet users have seen."
No, CAPTCHA is used to fingerprint users browsers and thus fingerprint the computer and user depending on how uniquie the browsers fingerprint and whatever aggregated data is combined.
You have to allow cookies, javascript and iframes just for starters before CAPTCHA will even begin to work.
CAPTCHA is also favorite tool of scumbags that hijack sites to redirect mobile browsers.
Biting the hand that feeds IT
