There's been a dozen times just this year, I yelled at people their tires are half flat. Just plain clueless, IMO.
I let a girl use my pump one day. She barely knew how to use it on her Linus bike. I told her she had to count a hundred strokes.
She didn't know what the pressure should be either.
Except for commuters, very few carry a pump. Maybe there's lots with a CO2 in their pocket, like race bike guys.