Maybe, though I would say that it is odd that some companies (who presumably have legal council) have decided to implement warrant canaries. Quite a few have "activated" them, though it's quite possible some lawyer told them to knock it off. It is at least a little less crazy than arguing that you are a free inhabitant and that you don't need a drivers' license.

In Australia we have an explicit law which makes it illegal to talk about the existence or non-existence of a journalist surveillance warrant (though in Australia you might not even be aware of such a warrant's existence). This means that any discussion of such warrants is technically illegal -- making warrant canaries impossible to implement here. The minimum sentence is 2 years, and it's specifically targeted toward journalists (and affects anyone who shares already-public information -- so retweeting such a story on Twitter would be a serious crime).