Do you think that a 3rd party should be able to judge and ban you at will for something that you say in a group chat when everyone else in said group chat is fine with it? I presume that the author of the article is not fine with it, which is why they suggest to avoid discord. What would you do in their place?
Yes. If I were running Discord and learned that there was some Klan group advocating hate against black people, I'd shut it down – even if everyone in that chat was fine with the discussion.
It wouldn't be beneficial to me to have my platform be a host for that content, and it's not beneficial to society for me to facilitate hateful people easily connecting with each other.
The internet is not private by default; it's public by default.
I haven’t even had the ability to participate whilst maintaining my location privacy.
In retrospect, I should not have included that portion of the essay. It was used as an example of why demanding users agree to an unreasonable legal agreement that demands they give up basic rights is not a good hoop to make them jump through, not a defense of that sort of behavior. I thought that part was clear but I guess it wasn’t.