Alexa Top Sites Captcha and Tor Block Monitoring

The project aims to monitor and track down in detail how the Alexa Top 500 websites behaves to different Tor clients, whether a particular website is blocking the Tor exit node completely, or throwing Captchas or is it disabling certain functionalities (login, posting etc.). Would also be looking in for similar observations for all tor exit nodes or any peculiar case (region-wise, specific exit node, etc.). The project also focuses on how often do these webpages return Captchas or even block the pages thereby limiting the users to browse internet freely and anonymously.