A lot of players who ref don't understand the philosophy of having a referee in the first place.
The job of the referee is to guarantee that the game is played fairly. Most refs feel their job is to pull as many people as possible. What they forget is that they are employees of the series, and their job is to provide a service… a fair game for both sides.
A ref’s job is to make a decision if the game is being played fairly or not. The rules are the guide to what is fair play, and the ref uses these rules as a metric to determine if the play deviates from fairness, and the degree of penalty which will make it fair again.
The primary purpose of a penalty (141, 341,etc) is to restore the balance of fair play.
The secondary purpose of a penalty is to create a negative re-enforcement that discourages players from cheating.
A player who continues to play with a pack hit, but makes no indication that they felt the hit, and reacts to it in no way, is likely not cheating. They are however affecting the fairness of the game, and the fairness needs to be restored. If for example the player played on, and shot an opposing player, they have really affected the fairness of the game. It is the job of the referee to restore the balance:
Either pull the player with the pack hit, and call the other player clean.
Eliminate both players, but 141 the player with the pack hit.
The situation changes when a player gets hit on the pack, flinches, and then continues to play. Now the player has indicated that they are aware they have likely been hit, but continues to play with the intention of gaining an unfair advantage. Now the referee must restore balance, but also punish the deliberate unfair actions of the player. If the player continued to play, and eliminated an opponent, the very minimum that must happen is a 141 penalty.
To restore fairness:
Either pull the player with the pack hit, and call the other player clean.
Eliminate both players, but 141 the player with the pack hit.
In addition the referee’s duty is to punish the player, in which ever way the rules allow it. I would imagine this infraction requires a 341 penalty, but the referee must be certain that the player in question is in fact deliberately trying to gain an advantage.
The difference may seem trivial, but we must understand the goal of the rules (fairness – in case you forgot), and if we keep our attention focused on the goal, the logic of the rules becomes clearer.
I know, life isn’t fair, but that doesn’t mean we should stop trying.