The challenge administratively is getting fatties to fess up when the book the trip........ and shocking as it may be............. people lie........... especially fat, lazy, low impulse control, selfish people. So by the time they arrive at the gate for the FA staff to see they are not going to fit in the meat bag rack, there may well be no more seats to be had on that flight.
And of course, drama will ensue...........
Administering to the social disruption that narcissists subject society to is a fools errand, and a thankless one at that.
No easy way to do it............. tubbo either has a couple of adjoining seat tickets, a first class ticket, or no getee on planee.
And it will still be an ugly scene at the gate, every fricking time............ Be great to make a tv show about it!