The following example displays a flaw in the rule language that is somewhat technical, but important.
1/10, A-30, 6:00 (2), A=7, B=10. A11 is three-year starting "quarterback" for Team A. Team A initially aligns themselves in a traditional formation, with 5 "tight" interior linemen, a tight end, a split end, a slot back to the split end's side, a back spread wide to the opposite side, a running back (A45) about 5 yards behind the left tackle, and A11 in a shotgun formation, standing at about 5 yards directly behind the snapper. After several seconds of reading the defense, A45 takes one easy step forward, then turns to his right and, while running parallel to the NZ, catches the snapped ball in front of A11. As A45 continues to run to the right (behind the NZ), A11 moves to his left, as a potential pass receiver. A45 abruptly stops and throws a legal forward pass toward the split end at the 50. (At this time, A11 is at the numbers on the left side, with no opponent within 10 yards of him.) B23 intercepts the pass and begins to advance. B23 is at the A-40 when passer A45 is moving to pursue B23 when blocker B77, from directly in front of, an in full view of A45, blocks A45 by leading with his shoulder into the head of A45, with forcible contact.
Is this a 9-1-4 targeting? Is A45 a defenseless player? He was the passer, but that status disappeared long before he was blocked. Was he the "quarterback?" I don't know. What is a quarterback? At the turn of the century (Wow - I have to identify the 20th century), in the old "Wing T" formation, the 'quarterback' was called that because (in position to receive the hand-to-hand snap) he was positioned about 1/4 of the way into the backfield. Halfbacks were about one-half way into the back field. And fullbacks were - you guessed it - all the way into the back field. By that definition, he wasn't the quarterback.
But what does the word "quarterback" mean today? I believe every sports minded American considers the quarterback to be the player that is the exceptionally talented passer on the team, and is also (by default, if not by actual ability) the team leader. Why is this important? Well, we have a rule that says a "quarterback" is a defenseless player following any change of possession. But, we have no definition of what is a quarterback.
I understand that the schools (somewhat selfishly) want to protect their "star" player(s). And we all recognize that opponents will attempt to 'seek and destroy' the star players on their teams, if given the opportunity. If the rules committee wants a rule that offers enhanced protection for the star offensive player(s) on each team, they need to say so, and provide a definition in the rules. Unfortunately, I think that would mean that the team (HC) would need to identify, to the Referee, every player that they deem to be a "quarterback" when in the game. That opens a can of worms. Say team A identifies three players as QBs. Then two of them play during the same down, and one of them gets creamed, with a possible targeting action. Does he have this enhanced protection, even if he was just a 'decoy' prior to a change of possession, and is actively attempting to pursue the opposing ball carrier (after the COP)? Perhaps, in exchange for enhanced protection, such players may not block or tackle an opponent at ANY time. And they must wear some special identification, such as red arm bands or something.
Just rambling.