If you don't want your stuff permanently archived then don't post it on public websites. It's sad that people don't give a shit about their privacy and overshare everything these days.
If you go around a bar with a tape recorder and directional microphone capturing conversations from unsuspecting people and then use those private moments to launch protracted harassment campaigns, you’re an asshole.
No matter how much you say “they didn’t have an expectation of privacy!”
If you want to talk privately - talk to people that you trust and use apps like Signal that delete messages after some time.
What specifically do you feel is different?
It's completely different if someone sneaks into your home and leaves microphones there.
I think it’s very telling you made a strawman rather than respond to that point.
That’s anti-social behavior and it’s okay to call it such.