Regarding smoking
Maybe the airline can "advise" smokers to take the flight that stops over at Narita instead. There's still this choice for them.
A noticeable thing about "air rage" reports was their rise a few years ago coincided with the withdrawl of smoking accommodation. It often gets blamed on booze but I always wonder if the real reason is the addicts being denied their nicotine in a way they are not used to. Any analysis on how many air rage attackers are smokers ?