The officers faced allegations they breached Standards of Professional Behaviour by driving the car for their own pleasure, speeding, failing to challenge one another's behaviour, and failing to show courtesy and respect, which the panel found amounted to gross misconduct.

“The members will show courtesy to the witnesses, Mr. Gohmert,” Nadler retorted.

The guidelines also advise police to show courtesy when explaining the reason for stopping traffic, rather than using intimidation or force.

But in five years of teaching at Libertas School of Memphis in Tennessee, Bradley has seen kids persistently try to solve math problems until they get them right, learn to show courtesy when they accidentally bump into a friend, and ask astute questions about parts of insects or features of the nearby Mississippi River.

The guidelines have been introduced to try to maintain a safe environment on channels run by the three households, and call for users to show “courtesy, kindness and respect”.