I don’t think the point is to leave the bots out. It looks more like grabbing even more info about you, because you can know a lot about the person just telling them to wave their hand on a cam:
sex, gender, skin colour, age
do they have calluses? This hints profession
do they bite the nails, leave them to grow too much, or carefully trim them? This hints psychological factors
what’s on the background? Even a blank background hints the person is a bit more privacy-conscious.
I don’t think the point is to leave the bots out. It looks more like grabbing even more info about you, because you can know a lot about the person just telling them to wave their hand on a cam:
All good points. I was just thinking I probably would not be willing to do any camera-based captcha.
At a certain point if they force me to stop being online maybe that’s not so bad.