But practically lots of people have spent a long time posting their opinions carelessly on the internet. Just protected by the fact that nobody really has (or had) space to back up every post or time to look at them too carefully. The former has probably not been the case for a long time (hard drives are cheap), and the latter is possibly not true anymore in the LLM era.
To some extent maybe we should be acting like everything is being put into a perfect distributed record. Then, the fact that one actually exists should serve as a good reminder of how we ought to think of our communications, right?