Dramatic customers are a dime a dozen, barking orders at cashiers, clerks, waiters, and the like, with a sure sense of entitlement that allows them access to the vast club of Karens. One customer approached an unsuspecting cashier, obviously in a bad mood, buying candy for ten cents, yet handing the cashier a $100 bill. The cashier explained he didn't have enough change, and offered the candy 'on the house'. The dude replied rudely, and demanded that the cashier do his job, adding that he is 'r…