Agreed, I've noticed this type of signaling often in the hospitality industry. I'd compare it to a DSL with which a leader can communicate unobtrusively with th

Agreed, I've noticed this type of signaling often in the hospitality industry. I'd compare it to a DSL with which a leader can communicate unobtrusively with those they lead. In certain cases it takes more time and effort to communicate information or instructions verbally, and it's more noticeable.