Contact lenses?
I do the flatcase in my machines too, but it stopped being such big a nuisance to me when I moved to ZSH - it can autocomplete case-insensitively.
Schiphol in the Netherlands, Milan and Rome in Italy, also in some airport in London as I recall.
But thinking about it, some things like food and water at the food court I might have never been asked.
Oh well.
In EU they will not sell you almost anything already if you don't show your boarding pass. It is very easy to keep a drink counter per passenger.
I also couldn't remember. It's probably Tenacity.
Their usernames are the random ones proposed by the platform, such as Lazy_Platform_34.
Contact lenses?