No matter what you do if you are on one of these platforms (this one included probably) they, Palantir and multiple other entities know you really are and where you live.
Your defense against censorship and retaliation is not faux anonymity, but a functioning liberal democracy.
I'm not certain that local police forces are always consulting the NSA or Palantir to find out who is behind a particular account. I would guess that the vast majority of arrests for offensive posts were made openly under a real identity, with only the most extreme cases leading to a deeper investigation.