“groovy mother...”

This I like a lot — CAPTCHAs partially made up of text that couldn’t be OCR’d successfully (so bots are unlikely to crack it), the solving of which in turn helps the Internet Archive digitize books.

CAPTCHAs to keep the internet looser(sic)-free. I would fully support this project.

CAPTCHAs using cat/dog pictures to prove sentience. IM IN UR WEBBROWSER PROVING UR HUMAN.

Finally, someone has harnassed the power of “Am I Hot or Not?” for good. Pick the three hot people to prove you’re human.