Please don't try to twist your dumb rant into some sort of free speech issue.
The multiple people telling you to shut up isn't because they are trying to squelch discussion on the topic. They are telling you to shut up because you, specifically, bring negative value to the discussion and you are responsible for decreasing the signal to noise ratio.
In your example about the dumb, drunken football fan yelling at the TV, the people in the bar are now starting to tell him to STFU because they want to watch the game and not have to listen to the useless, drunken ranting of someone with zero credibility.
The multiple people telling you to shut up isn't because they are trying to squelch discussion on the topic. They are telling you to shut up because you, specifically, bring negative value to the discussion and you are responsible for decreasing the signal to noise ratio.
In your example about the dumb, drunken football fan yelling at the TV, the people in the bar are now starting to tell him to STFU because they want to watch the game and not have to listen to the useless, drunken ranting of someone with zero credibility.