I am sure a lot of people check their personal correspondence — or FR — during work. I have a friend who’s an assistant AG in another state. When the talk on an email chain with some friends turned political, he warned us to cut it out or else take it to his personal email account. As I said, that’s the way it’s supposed to work.
Yeah, the Dec of Defense had so much idle time on his hands, that he checked his personal email every hour.