A-2 taps the ball after A-1 scores to hinder team B's throw-in. Is the official correct to issue a warning for delay?

In this scenario, A-2's action of tapping the ball after A-1 scores is considered a delay of game. The rules state that once a team scores, the opposing team (in this case, team B) is entitled to a throw-in to resume play, and any action that interferes with this process can be penalized to ensure the game proceeds smoothly. By tapping the ball, A-2 is intentionally trying to disrupt team B's ability to initiate the throw-in, which constitutes a delay.

Issuing a warning for delay is appropriate here as it serves to inform team A that such actions are not permissible and helps maintain the flow of the game. This warning is a common approach before applying more severe penalties for repeated infractions. Thus, the official's decision to issue a warning is consistent with the rules regarding player conduct and game management.