One of the basic and insidious aspects of filtering is that is comes very possible to prevent all knowledge of an event or idea propagating.
If an event occurs which is filtered across the board, in news networks and media, and now filtering of the Internet itself - how does someone get to know it happened?
It's allows governments to prevent information like the "arab spring" being generally known. How does the populous get to know if something like this happens?
Back in the day, when I used to live in england, there seemed to be a regular series of "sex scandals" where some politician would discovered in fishnet stockings and being spanked before going off to represent his members in the house of commons or lords.
I assume such information, if described in enough detail, is considered porn and therefore blockable. You are then at the mercy of the media which can be ordered or bribed into not publishing or discussing such things. If it is never reported - has it never happened?
If PRISM is considered a national security issue by the government, does that allow them to block it from Internet searches? If such a thing happens and you know that filtering is happening - but not what is being filtered - how do you get to know what you are not being allowed to know?
Is reproducing information of that nature in a blog putting you on a watch list of subversives? Is simply asking these questions doing that?
If something is reported in mainstream media in a particular way - and there are dissenting ideas, knowledge and experts - but they are able to be filtered out by the unseen powers that be - how do the people engage in conversations about it?
If something is inappropriately filtered, because something triggers the process or because of human or programmatic errors - how does it get corrected? Is that process not only done - but seen to be done by the people for whom the information that site contains serves.
I am staggered how freedom to privacy and thinking is being systematically eroded by governments across the globe without any apparent reaction by the people they govern. Perhaps the reactions to this are being suppressed and I just don't know it is....