It is an standard operating procedure to wait for your turn and time to be accommodated by a busy individual. But if you are seen relax and not occupied with any activity, the tendency is, your inviting or giving signal to others to distract and sip your time. The situation to be visibly busy in not easy, but is is an advantage to the one who is always doing it, he will accomplish many things and the tendency to be disturb will be minimize. Besides it will motivate and encourage others to work seriously.