The key word here is conditioning..divers have been conditioned to recognize the mask on the forhead as a sign of distress which I believe will not change. I understand your point that if there is a group why would anyone assume that everyone there was in distress. I think the happy medium would be to turn the mask to the back of the head..otherwise you will probably have someone say someting just about every time. After all, it tends to be an industry standard..