It gave me AIDS just reading the comments, and the content of the post is not only irrelevant to the title to attract users, it's stupid, there is not a single social network in the world that allows its users to be 100% anonymous, which the OP think Lemmy was going to be, I mean, in that case we should all use Lemmy instances through Tor and not even then, we also need to use a VPN and a proxy.

It depends on each person how much information they want to leave on the network, but as far as I know, 99% of social networks do not have a button to "Delete my information immediately and permanently", usually that little hidden button only allows you to no longer be able to access to your information, but by creating an account you accepted the terms that they retain your data even after deleting your account.