It seems like many of these problems could be solved if one or more airlines would double their fares and then give a 50 percent discount to all of their "preferred" customers. Anyone caught stinking up a plane, getting really drunk and loud, lifting an armrest to get the neighbor's space, or trying to prevent someone's seat from leaning back would find their "preferred" status yanked in a flash. Faced with the prospect of having to pay double to fly they would just take their stinky/drunk/overflowing/bossy self elsewhere.