content: I don't doubt it. It's primary purpose is identifying if something is human or not. but who cares what they do with the data it produces as a result. The original recaptcha was used to train OCR software for google books, after all. It's not personally identifiable, or otherwise useful for connecting to a particular person. Literally any other data (of which google collects plenty) is more harmful. The worst part is that it exposes to google what site your browser was attempting to perform actions on.