Flight crews do not want to have to learn hand-to-hand combat in order to do their jobs! A possible solution would be to have at least one security person on every flight, but this would be expensive and the airlines do not want to give up the seats on crowded flights. Many unruly passengers are people who are already drunk when they get to the airport. Why do we then provide them with opportunities to get even more intoxicated by selling them alcohol in the terminal and even on the plane? The answer is simple, the airports and airlines make money on selling booze at the expense of sober passengers. FAA needs to prohibit alcohols sales in the terminal and on planes!