The CCPA (USA version) and GDPR (EU) both specify Personal Data, not Personally Identifiable Information. So the contents of my posts are my personal data, even if my username doesn’t identify to a real person. If I want my personal data removed from Lemmy, the GDPR allows for me to request it to be deleted.

Lemmy is still in the early stages. I’m not asking for changes to be made right away, or even this year. But I do feel that my personal data should be under my control. Lemmy should be programmed to federate out the the deletion of all my personal data, if I make such a request.

Where the controller has made the personal data public and is obliged pursuant to paragraph 1 to erase the personal data, the controller, taking account of available technology and the cost of implementation, shall take reasonable steps, including technical measures, to inform controllers which are processing the personal data that the data subject has requested the erasure by such controllers of any links to, or copy or replication of, those personal data

(*) Note the CCPA has a ton of exceptions, and only really applies to the larger social media sites.