So I just decided to check out the new features like I often do. I'm on my laptop and had my volume on max because I was watching a video that had rather quiet audio.
The program took a bit to start so I put it in the background and kept watching the video. Suddenly there's this incredibly loud terrible high-pitched noise coming from my laptop speakers - a feedback loop. I have no mute button and the volume control didn't seem to respond so I quickly decided to forcefully shut down my laptop. It was in the middle of the night and I fear I might have woken up the person sleeping in the neighboring room.
I checked Facerig again with lower audio and confirmed that indeed it has the microphone output enabled.

I suggest to not have the microphone input come out of the speakers by default. Thank you.