I think it would be great if airlines provided meals again like they used to in the dark ages..... then nobody would have to worry about bringing food on, and the airlines could have their pre-packaged stuff that was already nut free for everyone.
I also would like airlines to not treat passengers like cattle being shoved into small spaces just waiting for slaughter.
My guess, is if airlines rolled out "humane travel" that included meals, that happen to be nut free, lower baggage check prices, and other stuff that used to exist, people might be less cranky in general about flying and feel more like being accommodating and understanding of the medical needs of other passengers.