There could be a legally binding contract stating that any deletion request must be forwarded to all parties it was send to, and that upon receiving such a request the data must be deleted.
I do not think this would be unreasonable to ask to servers, especially as this deletion receipt could be fully automated.
There could be a legally binding contract stating that any deletion request must be forwarded to all parties it was send to, and that upon receiving such a request the data must be deleted. I do not think this would be unreasonable to ask to servers, especially as this deletion receipt could be fully automated.
Or there could be a delay of one minute before posts get federated, giving the user the option to quickly delete a comment or post.