I look at it this way: I don’t let in the crazy person on the street screaming racist garbage into my house, so I also don’t have to listen to or engage with that person on the internet, either. That doesn’t make my house an “echo chamber.”
For a long time I tried to treat “internet people” with some level of “respect” so to say. That is, I didn’t spend time blocking people and whatnot. But now? Screw em. I don’t have time to listen to nonsense, so if someone tries to come in to a conversation in bad faith, it’s very easy to block and move on.
Or on short-form social media like Bsky or Masto or whatever if someone posts a racist thing. Or a bigoted thing. Block and move on.
Those trolls live off of engagement so just don’t give it to them. And those same trolls are the ones complaining about “echo chambers.” “Waaa, no one wants to listen to my racist nonsense. It’s an echo chamber!” No, you are just a trash human, and no one is obligated to listen to you.
The result for the people who block them is still the same, though: they no longer see the troll garbage.