Why would anyone want to do this? It’s like attacking the UN peace keeping troops or the Red Cross. reCAPTCHA is doing good work, digitizing scanned printed books so that the the text can be made available for online searching. Breaking reCAPTCHA is like defecating in the village well, ensuring that everyone suffers. No one benefits from reCAPTCHA being broken. No one.
While not a fan of Captcha in general, I have always appreciated the crowdsourced element of digitizing scanned entries while dealing with spambots. However, to be fair, we are in need of not only a more user friendly spam protector as well as a more efficient OCR technology. Maybe this will force both parties to find better solutions.