Why are aircrafts so special that they need such special rules about banning people who commit a minor crime one time? Remember these crimes are minor crimes. Yet people are honestly thinking the correct level of response for an assualt is the inability to use an entire industry.
Of course Airlines want the power to banish people from the industry and give their hosts and hostesses power that people will be afraid of them and just comply with everything and anything. These people already have a lot of power in the fact not complying is a crime.
But to be fair, this is coming from a country where there freedoms are so limited it's a crime to cross the street in the wrong area.