I don’t think instance admin should mute or block communities just because people don’t like that some content shows up on their ALL timeline.
Now, there is a case to be made about muting some content, but in general the all timeline is supposed to be wild and untamed.
I used to scroll /r/all all the time on Reddit. The very top was the normal stuff - memes, games, people shouting at each other about politics… a few pages lower was the interesting stuff that really got my attention. And then if I scrolled far enough I found something that made me go “that’s enough reddit for today”. That was a good balance.
Here, the freaky stuff jumps out waaaaay sooner, but I’m not complaining. It’s getting more balanced every day, though there’s quite an overabundance of memes for my liking currently.