Democracy is quite literally "allowed to put up political posters" and "making your voice heard in public", if that's not a part of democracy, what exactly does "democracy" mean to you? Maybe that's easier to talk about, rather than what you think democracy is not.
> democracy is not displaying insulting posters or shouting like mad in the streets
The supreme court disagrees
> The Court recognized that "uninhibited, robust, and wide open" political debate can at times be characterized by "vehement, caustic, and sometimes unpleasantly sharp attacks on government and public officials."