Quite apart from privacy...
"reCAPTCHA makes it possible for the internet giant to challenge netizens to prove they are real people"
The reality is more like "reCAPTCHA makes it possible for the internet giant to challenge netizens to prove they are real Americans".
Most of the images are parochially USA-biased and culture bound, which indicates the level of care with which they are chosen for a supposedly "universal" service.
Biting the hand that feeds IT
