ReCaptcha does a similar tactic but rather than unsolvable it's a stream of the most annoying captcha -- "select all of image until none are left". Fail one and you're back at the start. You do have the option to cycle captcha, but 9/10 times it'll be this one. Eventually you'll get locked out of captcha entirely. Anyone who has used Tor on Google has probably experienced this.
> ReCaptcha does a similar tactic but rather than unsolvable it's a stream of the most annoying captcha -- "select all of image until none are left".
In such a situation, I often think: isn't the fact that one makes "stupid mistakes" when attempting to solve a ReCaptcha rather a sign that the entity that is attempting to solve it is a human?
The worst cpatcha has got to be Rockstar games support. You have to click all the images of rolled dice that sum up to 13, 5 times in a row. Then another 5 for some reason. If you make one mistake, you go back to 0.