451

New HTTP error code 451 to signal censorship

Mark Nottingham explains HTTP Status Code 451, not to be confused with Farenheit 451, though I can see how you could be. See also Warrant Canary. Via Tam, Status 451, Google & my idle curiosity.

What status code 451 does NOT tell you is whether the legal reason is someone enforcing their copyright, or whether someone in the government just doesn't want you to see something.