You are confusing an implication for an equivalence. I've said that those who are not open to arguments should not have a voice. From that it doesn't follow that those who argue should always be listened to.
I imagine a concrete implementation of this idea as a meme that people themselves would recognize this as a good rule and that they would consider it as a decision aid whether or not to participate in a certain group.
You're effectively just juggling the same argument. If I'm to hang up on salesmen, then I'm not open to arguments. Thus you claim I should not have a voice.
Oh, you mean it that way. Anyway, I’ve already said that it should rather applied to large movements instead of interactions of individuals. The current ideal of free speech can’t possibly realized to its fullest extent either/anyway.
I imagine a concrete implementation of this idea as a meme that people themselves would recognize this as a good rule and that they would consider it as a decision aid whether or not to participate in a certain group.