This sounds like it could be a feature? If you want a non-moderated space you could sign up on a wild-west server. If you want a deplorable or snowflake-free space, you find the instance that fits. Facebook/etc is already shaping our filter-bubbles, at least this way you get to define your own filter bubble, or chose to have none — and do so knowingly. Not sure how it handles RTs from instances outside of your instance’s setting, but would guess each site controls that too.