what you said on NA about NAS is correct generally, but it's not the medium. a few people always fuck it up for everybody else unless there's appropriate moderation. NAS and a few others have too little, most corporate media and many fedi servers that block NAS have too much. the trick is to favor free speech but not antisocial behavior. the "refuse to accommodate others in personal behavior" types.
decentralized social media is really important. like podcasting and #v4v. don't give up.