You may have heard of the DA-Notice. This is a formal request, from the government of the day to the editors of newspapers such as this, to kill a story on the grounds of national security. The DA-Notice system is voluntary, and it works because it is not deployed as a method of censorship. Tiny numbers of DA-Notices are issued. Tiny numbers of stories are killed. But, in our internet age, in which communication is supposed to be easier, and freer, than ever before, that is changing, and not for the better. Welcome to the world of the G-notice.