IMO there's not much technical tools that can prevent the problem, and mute/block can just help with many limit.

It's the environment, so the users creating it, that organically should prevent idiotic language and idea to harm/spread or be celebrated.

Of course something like that would be long and hard to be obtained and in order tu succeed, people should constantly point out what they think.

In the end, even in closed protocols or platform where there is censorship or an account can be banned.. the same person can open a new one with another email in no time and start again to harass/spread shit or whatever stupid behaviour it was.

In an environment where when you spread negativity/stupidity it doesn't create more engagement (like often on other platforms), or it receives as response comments from other users that outline its stupidity, maybe those kind of people will mute themselves.. or will be mute by anyone during time and they will end to be completely ignored.

..Maybe I am naive.