I’ve always done the same thing and encouraged my children to do the same. My daughter, who went to Case Wester Reserve University in Cleveland, a true “techno-nerd” university, said that their student-run tech center advised the same thing. It’s just common sense.
You would think people like Comey would consider this a necessary security measure.
For instance, it could provide an alibi if something was done via your computer and the video evidence shows you weren't using it at the time, or that someone else was.