Captcha usage

Hi folks,

This is the first of occasional small requests for help on the data front.

I have a tiny little poll going here on the subject of captchas. Three simple questions with yes/no answers.

I am keeping it open for another week or so and then I will publish some comments on the outcome.

______Interim results suggest fewer than half my respondents are aware that reCaptchas are used to solve OCR problems. This is interesting.