Captchas solve the wrong problem. Abuse is what you want to prevent, and so you need to detect abuse, not humanness. Rate-limiting, reputation check, web of trust etc all are valid techniques.
Bots can be nice. Humans can be bad. Focus on the right problem.
Comments
After all Gates isn't that evil? Holy shit this idea! Sad.
I wanted to do Human Captcha[0] and people told me it is creepy but this is on another level.
[0] https://news.ycombinator.com/item?id=28101966
Captchas solve the wrong problem. Abuse is what you want to prevent, and so you need to detect abuse, not humanness. Rate-limiting, reputation check, web of trust etc all are valid techniques.
Bots can be nice. Humans can be bad. Focus on the right problem.