Just to make things clear, this code isn't about censoring the Internet, which is already happening. The 451 code has been created for greater transparency and it will let people know that a site is being censored.
IETF assigns Error 451, the new HTTP code for internet censorship
The Internet Engineering Task Force (IETF), the independent organization responsible for many of the internet’s operating standards, has approved a special HTTP status code known as ‘Error 451’ that will be used on pages that have been censored by the government for legal reasons.
“This status code indicates that the server is denying access to the resource as a consequence of a legal demand,” said IETF in a statement.
