> “I’d like to speak to your manager” customer who thinks that if there’s a 10% chance of getting what they want by being a jerk then it’s worth pushing as hard as they can.

Throw those people out immediately. Not only are they bad customers themselves, they also drive away the good ones.

> Some of the customer contact we’d get from one of the countries we served were out of control mean.

genuinely curious. Which country was it?