What isn't being said today because of the way speech and power is structured in the USA? Is there really any voice out there whose words substantially threaten the government? Whenever such a voice gets loud enough, out come the battalions of cops with riot gear, armored vehicles, and chemical weapons. The mainstream media never questions this clockwork logic: it must be as natural as the sun rising and setting in such a society.
It is almost a truism that any institution of power will renege on all of its promised rights towards those who would curb or abolish its power. We know after the fact that the government of the USA has done so towards many, many people whom it felt threatened it.
Let's try an experiment: you post some of the things that you think aren't being said, and we'll all see what happens.
Say whatever you want whenever you want; they're watching, but don't care enough to interfere if you're a nobody. Nobody will bother you until you have a following, and nobody will bother you in meatspace until you have a massive and physically active following.