This is an especially good time for you vacationers who plan to fly, because the Reagan administration, as part of the same policy under which it recently sold Yellowstone National Park to Wayne Newton, has "deregulated" the airline industry. What this means for you, the consumer, is that the airlines are no longer required to follow any rules whatsoever. They can show snuff movies. They can charge for oxygen. They can hire pilots right out of Vending Machine Refill Person School.