An IATA survey found that between 2007 and 2017, approximately 66000 episodes were reported on board aircraft as a result of sexual violence, assaults, threats and intimidation. These episodes were perpetrated by passengers against other passengers or crew members. On 19 August 2018, a 24-year-old American passenger traveling from Chicago to Tokyo urinated on another passenger.
Very rarely these are people who are suffering from mental disorders. They are normal people, such as we would we meet every day, who behave unacceptably on the plane. There are numerous cases in which the aircraft commander had to order coercive measures. Passengers tied up like salami, handcuffed, gagged until landing and delivered to the authorities, often at airports along the route instead of the planned destination. These passengers are now labeled in the aviation world as unruly and disruptive. They are more than rude bullies.
Those who choose to fly want to reach their destination safely and comfortably. They do not set out to experience uncomfortable, unexpected and dangerous situations in small and unfamiliar spaces or to be stranded in an unscheduled airport that has nothing to do with their travel plans.