content: Any power which can enforce silence as it pertains to anything can also enforce maintenance of one page of a website.  If you live in North Korea and the government is really above the law and not accountable to the citizens, sure. But American three-letter agencies have to at least make everything look legal. You can still challenge the legality of their demands and courts can rule in your favor. If the government can compel silence but cannot compel a lie, as EFF believes, then warrant canaries will help you warn users. Well, at least they will help you do so one time.