Violation or Absolutely Nothing???

[Nevadaref]

9-2-11 . . . The opponent(s) of the thrower shall not have any part of his/her person through the inbounds side of the throw-in boundary-line plane until the ball has been released on a throw-in pass.

PENALTIES: (Art. 11)
1. The first violation of the throw-in boundary-line plane by an opponent(s) of the thrower shall result in a team warning for delay being given (one delay warning per team per game). The warning does not result in the loss of the opportunity to move along the end line when and if applicable.
2. The second or additional violations will result in a technical foul assessed to the offending team. See 10-1-10 Penalty.

PENALTY: (Section 2) The ball becomes dead when the violation or technical foul occurs. Following a violation, the ball is awarded to the opponents for a throw-in at the original throw-in spot.


It is in fact a violation for the opponent to break the throw-in boundary-line plane. The result is a team warning for delay or a technical foul if the team had been given a previous warning of any kind.
When the result is only a warning the game is resumed with a new throw-in as after any other violation.

If I were the administering official, I would enforce the rule and call the violation on B1 for breaking the throw-in plane and assess either the team warning for delay or a team technical foul as appropriate.

To fail to make this call unfairly penalizes Team A. The actions are Team A were legal at this time due to the RPP.