This is tangential, but I wonder if something like this could be (mis)used to break captcha - by feeding in the disabled-friendly audio captcha and passing the results back to the captcha server.
As voice recognition becomes more sophisticated I think captchas are going to have to evolve to kjeep up as well.
Captchas are utterly beat, and more so, it's not the technology or difficulty : they are a lost cause. Pretty much any problem you might present in a captcha, machine learning performs better than humans.
So today, failure to captcha is actually an indication that the other end is human.
As voice recognition becomes more sophisticated I think captchas are going to have to evolve to kjeep up as well.