Russia is trying that (white lists) and it's proving costly enough that even they have to back off. They'll probably get there eventually but it requires serious investment of money and time and inevitably hampers the economy.

interesting thanks. i guess its a drastic measure, which costs a lot, so there would be some potential tippingpoint in which the risks to the censors or the costs they are racking up by not doing it outweighs the costs of cutting it all off. Also ofcourse, 'they' need their populations somewhat with them. if an entire nation stands up you have a revolution, so maybe its a balancing act to prevent that. cut it here n there but keep the main perception its all temporary or localized etc