> At the end of the day, cops are people. They get tired, frustrated, etc. I don't expect them to act like my personal servants.

You shouldn't expect a cop to act as your servant, but you sure as shit have an expectation that they will act professionally and courteously towards you. You also should expect them to not abuse their power. I don't give a shit if your dog died and your wife left you, if you are given a position of essentially unchecked power over me, you better use it judiciously.