How often do people think someone really is leaving to go to the bathroom and back during the durraction of their wait?
HHN has had a simple procedure to reduce the chaos in this a long time ago, while not perfect, once the line hits over a certain time they will hand out raffle style tickets to give to each guest entering to give an idea of the order of the people.
Even when Space Mountain or Peter Pan is two hours, it is not happening that much people. The time wasted you know what and moaning about the you know what someone did is more than costing you anything, because it did not cost you anything, you just did not rudley gain anything.