If somebody steps on your shoes and doesn't apologize, then whatever — you met your jerk for the day. But if somebody tap-dances all over them and nobody else even notices, that's when it's pretty much impossible not to catch some feelings about it.
Like, apparently everybody but you got the memo that today was "everybody gets to disrespect you" day.
And if you're lucky enough to not remember a day like that, just keep these poor folks and their struggles in mind.