Do you think it would be possible if you remove the astronauts eyelids? Would that enable faster than light communication?

Facebook has ghost profiles of non Facebook users because of tracking embedded in “like” buttons on websites. If you wanted to go full paranoid I would suggest using an extension to change your user agent. But it is probably worth identifying the specific threat vectors you are concerned about.

Facebook is currently the social media defacto standard. Instances can always defederate in the future. The EEE argument doesn’t fit in this situation.