People are documenting their own personal lives without any protections. You can delete your account and the system will circulate a polite notification that other servers
should delete that information.
If you are a "sexworker" (sic) and you doxx yourself tough luck.
If you reveal your mental illness through the things you write about and the language patterns you use tough luck. (Pro tip: machine learning algorithms can read your social media posts and psychodiagnose you better than the psychiatric nurse practitioner you'll struggle to get an appointment with.)
People get these spams inviting them to play games where they ask questions trying to gather their answers to break into their bank account such as "What was the name of your first pet?" Even if you didn't have a tendency to be paranoid maybe you should.