Is this against the rules??

[Nevadaref]

Originally posted by JRutledge
It would be a technical for leaving the court for an unauthorized reason.

Rut,
I hear your argument about not stopping the play when the defense with benefit from the violation. I definitely agree with it and so does the NFHS as evidenced by the interps you quoted and intent and purpose of the rules paragraph at the beginning of the rules book. However, what you posted above is clearly incorrect given the rule change this season.
If the player's leaving is an act of deception or a purposeful attempt to get the official to call a violation which would benefit his team, that is unsporting and I have no problem with a technical foul for unsporting conduct being called as NFHS interp #11 says.
However, an official CANNOT charge "a technical foul for leaving the court for an unauthorized reason" as you wrote above. That is flat out wrong by rule this season.

I certainly don't see how leaving because the kid thought he should be out or that his team had too many players should be considered unsporting conduct.

In the original situation, you do not have an unsporting act. I would stop the game and call a violation on the defense unless the offensive team was making a scoring play. In that case, I would wait until the scoring play was completed and then make the call. An official can't just ingore this forever because one team is now playing with only four players due to one kid walking off the court illegally.