First we have to see that what are the benefits of these type of sites? You list the advantages and I will list the disadvantages, lets see which list will be critical? In short, everybody knows that media is creating opinion among people, not people's opinion but their own opinion what they are directed to create. I am in favor which content will create unrest anywhere in the world, it must be banned. There was a time when aljazeera's website and some other websites were banned by US, why? Why many developed countries keep chatting, phone calls, websites, etc under surveillance? It is not a matter of illiteracy but politics only.