What does a hierarchy of online censorship look like? In Iran, a lot like this. Design studio Hyperakt worked with the Iran Media Program to make this graphic of all the ways Iran suppresses information on the internet.
Beyond the complicated propaganda network, the other thing that stands out is the "20 to 30 per cent" figure of Iranians who are using tech to get around the firewalls. Which is a great illustration of the lengths people will go to make sure they can see internet porn uncensored information about the world.