Ask HN: Efficient way to generate Internet censorship statistics?

I think it would be interesting to create a tool that takes a certain number of popular websites and checks if they are available from two or more geographic locations. The idea is to determine how much % of the internet is censored in countries like Iran, China, Syria, etc. I'm trying to figure out how to do this automatically while at the same time properly detecting various censorship techniques. There are many ways to block access to a website so creating an algorithm that would compare the webpage and calculate the difference would make sense, but considering that most of the websites these days are full of dynamic content, I'm not sure how reliable such an algorithm would be. Does the HN community have any ideas or pointers? Also, would anyone be interested in teaming up for this project?