I still remember the conductor admonishing the bass section for playing an open D. If one of our little group hadn't flubbed the bowing, Mr. Pedantic never would have caught us. 'We always close the notes in orchestra', he told us. Of course, there are many reasons to play an open string like buying time to shift, for example. Anyway, we nodded our heads in agreement, mumbled 'yes sir', and then went on to do what ever the hell we wanted. Same in photography. Do you.