A separate Hacker News thread warned as early as December that the warrant canary was missing the declaration. Users on a new thread on Saturday criticized the lack of certain phrases on Silent Circle's warrant canary. One user said it should be "more explicit," stating that it has not received any legal process or demand from any level of government.
Although there's no law in effect to prevent warrant canaries from being used, Twitter is currently fighting the US government in the courts to have them protected under the First Amendment right to free speech.
Though they have been in use for more than a decade since the introduction of gag-provisions in the Patriot Act, signed into law in 2001, they have been increasing in popularity in the wake of the Edward Snowden leaks.
Morgan Marquis-Boire, a security researcher and director of security at First Look Media, the media branch of The Intercept, continues to work on an automated process for giving "signed warrant canaries to the masses."
Updated on March 9: the warrant canary has been updated.