@jwz I gotta be honest, a small part of me has a feeling that if someone says to you "You live in an echo chamber", and your immediate response is to say "Screw you!" and block them, it's quite possible that you live in an echo chamber. Are you trying to say you don't believe in the existence of Echo Chambers or that you just don't give a shit if you're in one? Those are very different things. The second one is fine, you can live your live however you want. The first one is absurd.