When I post anything online there is, in my opinion, an agreement in place there, similar to in real life. If I made an actual article hosted on a site which c

When I post anything online there is, in my opinion, an agreement in place there, similar to in real life. If I made an actual article hosted on a site which could be equated to news or magazines of old, I would assume it's permanent since I would assume the same in reality. If I post something in a discussion forum, I cannot be sure nobody there is recording it and keeping a copy of it indefinitely. I am however allowed to be upset and possibly persue legal action if the person who did happen to record it now sells it to anyone with enough money or trains an LLM on dictated versions of it. For the former I believe there is actual legal grounds with damages, for the latter I feel I can choose to never interact with that person again and disparage them publically for what they have done.