I'm asking about data stored on servers.
Lemmy, for example, has its instances owned by people and those people can do whatever they want with the data that is stored on their servers. If there is ever a legal issue involving a user's posts on Lemmy, how can courts or law enforcement determine that the owner hasn't manipulated the data to protect or harm the user?
Sure, they can look at other servers' since Lemmy is federated. But in the case of a non-federated service (which most are) or instance, this kind of verification wouldn't be possible.
Na, that's not true.
https://www.britannica.com/dictionary/practice
https://www.merriam-webster.com/dictionary/practice