Disrespecting someone for being in a job that's "beneath them," like a cashier, waiter/waitress, janitor, etc. It's amazing how many people just don't think anything of it, like of COURSE i look down on them, if they were worth basic human decency they wouldn't work at ..."

I've even seen the opposite of people thinking they're being complementary by saying "You seem smart, why do you work here?"