How is it privacy friendly? Not trying to troll of anything, but people literally share all their likes/dislikes plainly with everyone, and deletes don’t have to actually be executed on other servers.

Rename it to something else, see if it still works, if not revert, else it is needed.

No, an alias will only give you pseudo-anonymity. Even trivial analysis like counting which words occur together frequently in your writings can reveal with very good accuracy any other alt of you, so the available information of you is basically everything you have shared online with enough accompanying self-written text.