Microblogs are also treats as ephemeral spaces, which is why people have long been caught off-guard by their old Tweets wrecking their lives. It’s a space where people behave as if they’re having a vocal conversation, and the form of ‘public’ they’re in is like a public park. People are around who could hear, but they have to be at the park and nearby as it’s said to hear. The idea that someone could show up to the park 5 years later and put up a fuss over something that was casually expressed is an impossibility.
People have never treated forums as ephemeral. They’ve always been quasi-permanent spaces, where even the ability to edit your posts or replies is often time gated, or outright disallowed.
