I certainly never Log-out. Some folk feel that refraining from logging-out can put their computers at risk.
If I recall, correctly, it was Chuck who said that the only time one needed to take such action is if a computer other than one's own was being used; because anyone else using it would be logged in and could falsely pass themselves off as the usernamed.
In fact I have a logo on my desktop which takes me straight to my Profile page, without having to log-in.
Ron.