Silenced by whom?
Even the smallest authority may want to force others back in line.
“Your ideas suck and you should stop espousing them” is free speech too.
Not when it's followed by a blocking of the account being disagreed with.
Bullshit. I have the right to free association, too. I am not required to let you interact with me; I can block you on Twitter just as I can lock you out of my house.
[dead]