Not that I know any of this as a civilian, but don't the officers issue orders for troops to pose with such dufii as JFK and Hillary!?
They can, and I'm sure some do. When Clinton was President, he flew in to Kaneohe Bay, where dh was stationed. They guys were given a "choice" of lining up and meeting with him or a working party. My dh chose the working party.
My son was an officer. I can't speak for the rest, but I can tell you he would NEVER have ordered anyone to pose with him. If a higher commander ordered it, they would use some sign, like the crossed fingers. I hope they come up with something.