That is pretty cool, but unintended. I'll have to test if that remains to be the case. I am going to be creating a toggle where you can select the ignore behavior on global. I'll be making that moderation post I mentioned after I implement that. There are some community-based signals that can get you pulled from the global feeds (mostly a very high ignore-to-follower ratio, i.e. 10 ignores and 0 followers), but people should have the option to see everything that passes through. I'll probably roll personal ignoring into that. Do you mean decrease the contrast on the hushed user's text? That would make sense.It was sort of like being a vampire - once you invite them in, there's nothing you can do. I thought that was pretty cool.
As far as the feeds, I've always thought it was a little weird that ignored users don't show up in global feeds. That's kind of the point of "global feeds" - to see the stuff that isn't specific to you.
As far as "hush" I think it's pretty subtle. You want to make it obvious what it's doing, screen that text back.