I think that if there only would be a single instance in a social media (not the fediverse design) the censorship thing would make a solid argument. But from my experience, people who post things in a well moderated instance that is required to be deleted (such as insults, offenses, or anything against the accepted rules when signing up) usually refuse to delete themselves and are more likely to keep the harassment, even stronger.
If someone is forced into an specific instance and (...)