I really don't see why the concern. Anyone who doesn't want to see a community using muting, can simply not be part of that community. We all have our own blogs to post on. I almost never post in a community as I rarely even think to.
The muting only is in effect in that community. The post can still be found on the blockchain. I've recommended more than once to people that if they do post in a community to crosspost to their own Hive blog. So if something happens that a community decides to mute the post, it's still there for all to easily see.