One thing we did for the Wells Fargo captcha for example is to pick up the audio version that's there for accessibility and parse that instead. Which makes me wonder now. These more hardcore captchas like Google's where you have to mark buses and traffic lights. How do they get around accessibility legislation? Whichever large service is relying on them can presumably get sued for a lot of money because some of them are very difficult even for a non-impaired person.