"For some reason I just thought of the scene in Naked Gun where Frank goes to the bathroom unaware that he's still broadcasting from his lapel mic."
I've been in broadcasting. You'd be surprised how often this happens in real life.
I do church sound system, and I train all the workers to always mute the pastor's lapel mike when he isn't on the stage. People just don't remember to turn them off, and don't remember they have them on.