That's interesting. Off the cuff, I'll say it would depend on venue. Like on Reddit, you can easily have dozens of people saying exactly the same thing and other views can easily disappear in the muck. That's not even getting into the dominant view down voting all dissent. Still, everyone there can type out their thoughts in as complete a fashion as they so choose.
In person, things are different. The dominant side can and often enough does drown out dissent. In that case, the intent is to silence. So that would be "censorship" in a cultural, not legal sense which would be hostile to the freedom of speech in the cultural sense, not legal.
In person, things are different. The dominant side can and often enough does drown out dissent. In that case, the intent is to silence. So that would be "censorship" in a cultural, not legal sense which would be hostile to the freedom of speech in the cultural sense, not legal.