That's demonstrably false. I'll repeat what I said earlier: a vitriolic free-for-all isn't the only alternative to an echo chamber. (For what it's worth, I too dislike echo chambers.) It's perfectly possible to disagree with someone while remaining civil, as has happened multiple times in this thread. Bans and deletions are entirely appropriate for those posters who fail to abide by the terms and rules we've all agreed to:
"Be courteous and respect your fellow members. To be clear, personal attacks, aggressive messages, and passive-aggressive behavior is unacceptable."
You must agree to these terms and rules before using the site.
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Telling someone that they are damned because of their sexuality isn't courteous or respectful.