Some related wisdom that has been more useful for me: 5% of the people out there are assholes - the unsafe drivers, the "can I speak to the manager" customers,

Some related wisdom that has been more useful for me: 5% of the people out there are assholes - the unsafe drivers, the "can I speak to the manager" customers, the sociopathic case workers ... they're all in that 5%. You're bound to run into them, and they're bound to make an attempt to spoil your day. Learn to shake your head, shrug it off and go about your day knowing that 5% of all people are assholes.