I would understand that if he was using messenger all day and not doing jack, but as a normal user (which I’m guessing he is) using messenger is like talking to your co-workers. What now your going to pass a "not talking" during work hours rule? What really matters is if you do your job or not. Who cares if you talk on the phone or through the net. Did you get your job done? Well that’s what you’re paid for. Your not paid to be a slave.