This is how I see it:

"I'm going to put you on a list based on arbitrary criteria which I may or may not share, I won't tell you that I'm indirectly monitoring everything you say, and then I'm going to tell people you are a bad person with hateful ideas and suggest they ignore you by default. Since I don't agree with you, I'm going to tell people you are spreading dangerous misinformation.

By doing so, I am nudging people into my way of thinking under the guise of keeping them safe and making their experience better. Even though people are free to make these decisions for themselves, I know damn well that most people will never go and verify whether or not you should be on my list, or if what I have claimed about you is even true.

I also know that if I have hundreds or thousands of people on this list, virtually no one will spend the time checking. I will also associate you with well known trouble makers so that it adds credibility to my list, and by the time you figure out what I have been doing, the damage will have already been done."

This isn't a helpful tool. This is how all traditional social media looks nowadays and what I presume most people here have been trying to get away from.