@miriamrobern Yeah, it's just part of the design of ActivityPub: every single thing that anyone posts here is broadcast publicly to the entire network, without really any restriction, just suggestions as to whom it should be displayed to.

I'm always very critical of this because a lot of people here don't realize that they are publicly broadcasting content that they believe is private or at least controlled or restricted.

That's just the way the system was engineered. It's not how I would have done it, but people just need to realize it when they are putting content into it.