I do this too. I usually cycle through a few people if multiple people have their camera on. I also take snips and draw mustaches/glasses/graffiti on them in paint during really boring meetings.
Something like this recently happened in one of my university classes. We had a remote class in the evening on Teams.
One of my buddies felt very tired so he thought he'll zone out for a bit and mute the call.
After he proceeded to mute the call he realized that he'd actually muted the teacher for the whole class. It was hilarious, especially when he told me after. :)
