Do you have the bulletin? Not sure you can say he was 100% wrong based off this definition. ”
DISCONCERTING SIGNALS & PRE-SNAP ACTIONS
The intent of pre-snap rules is to define and govern what is allowed by the offense and defense. The offense, by design, has an advantage of knowing the starting signal, cadence, or sound, and the defense has an advantage as they are not limited in terms of overall player movements before the snap. To discourage tactics at the line of scrimmage designed to cause an opponent to foul or to give either team an unmerited advantage, officials must be on high alert for any type of illegal pre-snap actions by either team. Additionally, coaches should not teach illegal pre-snap actions designed to make their opponent foul.
These actions can sometimes be difficult to observe or hear in our noisy stadiums; therefore, officials must be on high alert to stop these illegal actions.
For the offense, focus should be on any movement by one or more players that simulate the start of a play. Special attention should be directed to the quarterback for action that includes any quick, jerky, or abrupt movement that simulates action at the snap.
On the defensive side of the ball, officials should pay special attention to sounds and actions that could create a disruption to the offense's starting signal or cause the offense to false start. This includes defenders near the line of scrimmage that make quick, abrupt, or exaggerated actions that are not part of normal defensive movement. The defense may move, but the movements may not simulate action at the snap. Additionally, the defense cannot use words or signals that simulate the sound or cadence of, or otherwise interfere with, the offensive starting signals. This includes using a clap on the defensive side of the ball that may disconcert the offense.”