After reading these two articles below, I believe all social media and public communications will within the next 5-10 years be SELECTIVELY censored for convenience by China and America governments. Ironically this is NOT what the citizens of these countries want, but what we are getting shoved down our throats as "Good for us."

http://open.salon.com/blog/china_business_central/2013/11/06/what_secrets_did_china_learn_from_snowden_heres_10  and

http://www.salon.com/2013/12/04/could_the_nsa_make_edward_snowden_disappear_partner/

Again you are living in a fantasy world. America can not censor content in Canada, UK, Aus , Fran, Germ, etc . And the American people would not allow the govt to do this. You have absolutely no idea what goes on in America (or any other country ). Americans are willfully apathetic. Americans do not rise up not because they do not have access to the necessary information but because we would rather keep upon Justin Beiber. Example, CNN was doing  an  interview with a congress woman about a very important topic and CNN cut from the interview to bring breaking news about Justin Bieber. 

You see my dear mouthpiece, America has figured out how to control it's population without banning content. Keep them entertained. Psychology 101, people want what they can't have and will take for granted what they have. 

If USA starts banning content then the masses from both both liberal and conservative camps would be united against the govt. You know why Americans don't care about NSA, wikileaks, and all the other bad stuff uncle same is doing, it doesn't effect "me". But you seriously think that a mechanism will be banned? Seriously, social media banned/ censored? You think too much like a Chinese bureaucrat. Social Media allows people to censor themselves, people choose what news and content they receive, blocking every thing else out. 

As I said time and time again, mouthpieces have 0 brains and no sense of reality. 

They don't use pure ban anymore, too much press.

They just make a service impractical for use: slow the bandwidth, reduce it to zero on regular intervals, no promotion on the copycat local app-markets, etc.

This way people will never see it was the firewall in action. No bad press, no face loss.

To an extent that solely depends on how the local counterpart is doing.