I am always pretty concerned about a "hot mic" situation. Not because I might say something outrageous, but because perhaps I want to sing the lyric stuck in my head, or problem solve by taking to myself out loud. Managing to disconnect is already somewhat hard when you jump in and out of meetings on multiple platforms. All it takes is forgetting a button and you're broadcasting yourself by accident. As a user, that's my initial pause when seeing these kinds of things.