Currently, that is not entirely possible. The information shared on that platform also ends up in thousands of different accounts. It is very difficult to establish traceability. For instance, if someone posts a photograph online, and it is downloaded by 15 of their friends, it will be downloaded by other friends because of the network. That cannot be controlled.
However, there is a very clear database that contains the vast majority of our personal information. I think that database should be erasable upon every user's request. That is a matter of basic human dignity, especially when someone dies. That kind of an issue becomes very sensitive when a person is living with an incurable disease and no longer has control over the personal information shared online.
So I feel that the very existence of that possibility, that power given to the user, is a matter of basic human dignity.