I have no experience with Amethyst (no android phone).  But, any solution will have its critics.  As for the haters, 'censorship' falls flat to me since all content would still be unmuted to anyone who chose a reputation threshold of 0%.  Also, individual follow lists should probably override this mechanism on that individual's basis as well (i.e. someone you explicitly follow should not get automatically muted).  So, IMHO, either of these available options would necessarily invalidate the 'censorship' tag.